Madagascar (original) (raw)
Formula: Ag2S
Localities:
Besakay Mines, Betrandraka Commune, Tsaratanàna District, Betsiboka, Madagascar
Andavakoera Gold mines, Betsiaka Commune, Ambilobe, Diana, Madagascar
Betakilotra (Betankilotra), Betsiaka Commune, Ambilobe, Diana, Madagascar
Formula: (Fe2+,Mn)(Ti,Fe3+,Ta)(Nb,Ta)2O8
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Localities: Reported from at least 10 localities in this region.
Formula: NaFe3+Si2O6
Localities: Reported from at least 19 localities in this region.
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Localities: Reported from at least 11 localities in this region.
Formula: Na4[Fe2+10Ti2]O4[Si12O36]
Localities: Reported from at least 8 localities in this region.
Formula: AD2O6
Formula: (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Localities: Reported from at least 7 localities in this region.
Description: Described as "priorite"
Formula: MnS
Formula: Na(AlSi3O8)
Localities: Reported from at least 81 localities in this region.
Habit: Crystals up to 2 cm; feltlike masses; saccharoidal
Colour: Colorless; pale-blue; greyish
Description: often as overgrowth on microcline
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Localities:
Anabohitsy, Atsimo-Andrefana, Madagascar
Ankafotia, Fotadrevo, Ampanihy District, Atsimo-Andrefana, Madagascar
Androy Volcanic Complex, Madagascar
Ankitsika Complex, Analalava District, Sofia, Madagascar
Itasy Volcanic Field, Miarinarivo, Itasy, Madagascar
Formula: (Na,K)AlSi3O8
Formula: Na(AlSi3O8)
Localities: Reported from at least 15 localities in this region.
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Localities:
Ambatofotsy pegmatite, Mahavelona, Soavinandriana District, Itasy, Madagascar
Ampangabe-Jabo, Ambohidratrimo District, Analamanga, Madagascar
Androy Volcanic Complex, Madagascar
Itasy Volcanic Field, Miarinarivo, Itasy, Madagascar
Formula: Na(AlSi3O8)
Localities: Reported from at least 6 localities in this region.
Formula: (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Localities:
Estatoby (Antanetinilapa), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Sakavalana mine, Ambatovita, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Ambatofotsikely pegmatite, Betsohana, Mandoto, Vakinankaratra, Madagascar
Sahatany Pegmatite Field (Mt Ibity area), Madagascar
Ambohimirahavavy Alkaline Complex, Antsirabe, Ambanja, Diana, Madagascar
Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
Localities: Reported from at least 25 localities in this region.
Habit: large irregular prismatic crystals
Description: Covered by iron hydroxides
Formula: Fe2+3Al2(SiO4)3
Localities: Reported from at least 11 localities in this region.
ⓘ 'Almandine-Spessartine Series'
Localities: Reported from at least 15 localities in this region.
Formula: KAl3(SO4)2(OH)6
Colour: white
Description: Compact masses of several kg.
Formula: Sr5(Ce,La,Dy)10(CO3)17O3 ?
Type Locality:
Colour: grey, rose
References:
Formula: LiAl(PO4)F
Localities: Reported from at least 8 localities in this region.
Colour: White, to white-grey, often translucent
Description: Samples of amblygonite on the dumps ( blocs up to 10 kg) and in the eluvial zone of the pegmatite have a brown-yellow alteration crust.
Formula: Mg2Al(AlSiO5)(OH)4
Formula: A B2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Localities: Reported from at least 32 localities in this region.
ⓘ 'Amphibole Supergroup var. Byssolite'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Localities:
Volonandrongo (Volonondrongo), Mangataboahangy, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Ambatomalaza (Ambatomalama), Morafeno Commune, Maevatanana District, Betsiboka, Madagascar
Ambodiriana, Ambodiriana Commune, Toamasina II District, Atsinanana, Madagascar
Formula: Na(AlSi2O6) · H2O
Localities: Reported from at least 18 localities in this region.
Formula: TiO2
Localities: Reported from at least 18 localities in this region.
Description: Behier (1960) reports find of anatase from the region of Ambatofotsikley
ⓘ Anatase var. Niobium-bearing Anatase
Formula: (Ti,Nb)O2
Formula: TiO2
Localities:
Andriba, Andriba Commune, Maevatanana District, Betsiboka, Madagascar
Ambatofotsy pegmatite, Mahavelona, Soavinandriana District, Itasy, Madagascar
Tomboarivo pegmatite, Sahanivotry Manandona, Antsirabe II District, Vakinankaratra, Madagascar
Colour: Yelllowish brown
Description: Pseudomorph after rutile
Formula: Al2(SiO4)O
Localities:
Cap Andrahomana, Andranobory, Taolagnaro District, Anosy, Madagascar
Ilakaka gem deposit, Ilakaka, Ihosy District, Ihorombe, Madagascar
Laondany, Andrembesoa, Betafo District, Vakinankaratra, Madagascar
Andalusite occurrence, Ivato valley, Ivato, Ambositra, Amoron'i Mania, Madagascar
Habit: microscopic crystals
Colour: Rose-coloured in center and colourless at the rims of the crystals
Description: Late phase.
Formula: Al2(SiO4)O
Formula: Ca3Fe3+2(SiO4)3
Localities: Reported from at least 6 localities in this region.
Formula: Ca3Fe3+2(SiO4)3
Formula: Ca3(Fe3+,Ti)2(SiO4)3
Formula: Ca3Fe3+2(SiO4)3
ⓘ 'Andradite-Grossular Series'
Localities:
Andrembesoa, Betafo District, Vakinankaratra, Madagascar
Gem Scapolite occurrence, Soamatasy, Ihosy District, Ihorombe, Madagascar
Ambohimirahavavy Alkaline Complex, Antsirabe, Ambanja, Diana, Madagascar
Formula: PbSO4
Localities:
Besakay Mines, Betrandraka Commune, Tsaratanàna District, Betsiboka, Madagascar
Bobasatrana, Ambatobe Anjavy Commune, Ambilobe, Diana, Madagascar
Ankisatra, Betrandraka Commune, Tsaratanàna District, Betsiboka, Madagascar
Habit: crusts and masses in cavities in galena
Colour: grey, black
Formula: CaSO4
Localities: Reported from at least 9 localities in this region.
Formula: Ca(Fe2+,Mg)(CO3)2
Formula: KFe2+3(AlSi3O10)(OH)2
Colour: Black
Description: Occurs in large plates.
Formula: Ca(Al2Si2O8)
Localities: Reported from at least 41 localities in this region.
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Localities:
Vohimena deposit (Vohimena Nord), Tranomaro, Amboasary Sud District, Anosy, Madagascar
Soamiakatra, Ambohitsimanova, Antsirabe II District, Vakinankaratra, Madagascar
Fonjay Massif, Morafenobe Commune, Morafenobe District, Melaky, Madagascar
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Localities: Reported from at least 17 localities in this region.
Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2
Formula: Ca5(PO4)3(Cl/F/OH)
Localities: Reported from at least 105 localities in this region.
Colour: yellow transparent
Description: A. Lacroix (1922) describes large crystals from this area
Formula: A B4[Si8O22]X · 8H2O
Formula: CaCO3
Localities:
Ambano, Ambano Commune, Antsirabe II District, Vakinankaratra, Madagascar
Mahatsinjo, Alatsinainikely, Miarinarivo, Itasy, Madagascar
Ambato-Boeni, Boeny, Madagascar
Anjohibe, Boeny, Madagascar
Formula: CaCO3
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Localities: Reported from at least 8 localities in this region.
Formula: As
Formula: FeAsS
Localities:
Besakay Mines, Betrandraka Commune, Tsaratanàna District, Betsiboka, Madagascar
Nampoana quarry, Ampamatoa, Bezavona Massif (Mount Bezavona), Ampasy Nahampoana, Taolagnaro District, Anosy, Madagascar
Esira, Amboasary Sud District, Anosy, Madagascar
Bevalaha Cu deposit, Belamoty, Betioky District, Atsimo-Andrefana, Madagascar
Formula: (Ni,Co)2-xMn4+(O,OH)4 · nH2O
Description: Investigated with a qualitative analysis by Behier (1960), may be a cobaltian asbolane or a heterogenite.
Formula: (Nb,Ta,U,Fe,Mn)4O8
Formula: K2NaFe2+7Ti2Si8O26(OH)4F
Formula: Al2(PO4)(OH)3
Localities:
Tsiambenana Quarry, Itremo, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Col d'Itremo, Itremo, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Analambano, Ibity massif, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Localities: Reported from at least 23 localities in this region.
Formula: (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Localities:
Ranopiso, Taolagnaro District, Anosy, Madagascar
Mafilefy phlogopite mine, Ampamata, Ambovombe-Androy, Androy, Madagascar
Beampingaratra Massif, Manevy, Amboasary Sud District, Anosy, Madagascar
Amboasary Sud District, Anosy, Madagascar
Ambindandrakemba Mine, Ambindandrakemba, Tranomaro, Amboasary Sud District, Anosy, Madagascar
ⓘ Augite var. Titanium-bearing Augite
Formula: (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Localities:
Massif d'Ambre, Diana, Madagascar
Itasy Volcanic Field, Miarinarivo, Itasy, Madagascar
Ankaratra Volcanic Range, Madagascar
Takarindoha Volcanic Field, Ambalavolo, Vatomandry District, Atsinanana, Madagascar
Formula: (Zn,Cu)5(CO3)2(OH)6
Formula: Ca(UO2)2(PO4)2 · 10-12H2O
Localities: Reported from at least 14 localities in this region.
Formula: Ca2Mn2+Al2BSi4O15(OH)
Description: Knut Edvard Larsen collection, identified by XRD at MGM, Oslo 1998.
Formula: Cu3(CO3)2(OH)2
Localities: Reported from at least 11 localities in this region.
Formula: ZrO2
Localities:
Andranondambo sapphire deposits, Maromby, Amboasary Sud District, Anosy, Madagascar
Rare Earths Prospect, Befitina, Antsirabe, Ambanja, Diana, Madagascar
Ikalamavony Group rocks, Ikalamavony Commune, Ikalamavony District, Haute Matsiatra, Madagascar
Formula: Fe2+Fe3+2(PO4)2(OH)2
Habit: crystalline masses
Localities:
Nosy Komba, Nosy Be, Diana, Madagascar
Amparihy Complex, Befandriana Nord District, Sofia, Madagascar
Ambohi Bory intrusion, Amparihy Complex, Befandriana Nord District, Sofia, Madagascar
Formula: BaSO4
Localities: Reported from at least 25 localities in this region.
Formula: (Ce/Nd/Y/REE)(CO3)F
Localities: Reported from at least 10 localities in this region.
Formula: Ce(CO3)F
Localities:
Andakatany Deposit, Andakatany, Manandriana District, Amoron'i Mania, Madagascar
Rare Earth prospect, Unnamed caldera, Betaimboay, Antsirabe, Ambanja, Diana, Madagascar
Ampasibitika, Antsirabe, Ambanja, Diana, Madagascar
Ambohimirahavavy Alkaline Complex, Antsirabe, Ambanja, Diana, Madagascar
Description: A specimen fra Behiers collection marked "Bastnaesite" was shown to be Bastnäsite-(Ce) (Simmons 2003)
Formula: La(CO3)F
Formula: Ca4Be2Al2Si9O26(OH)2
Formula: Ca(UO2)6O4(OH)6 · 8H2O
Localities:
Malakialina pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Bemasoandro pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Befarafara, Maromokotra Commune, Vohémar District, Sava, Madagascar
Formula: (Ta5+,Nb5+)(BO4)
Localities: Reported from at least 9 localities in this region.
Habit: Octahedral crystals
Colour: Grayish-pink
Formula: V3+2TiO5
Formula: AlPO4
Formula: Mn2+Mn3+2(PO4)2(OH)2 · 4H2O
Habit: small crystals< 0,5 mm forming rims around masses of phosphosiderite
Colour: redbrown
Description: Analysed by Miss Mrose with XRD in 1956
Formula: Be4(Si2O7)(OH)2
Localities:
Bemasoandro pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Unnamed pegmatite, Mandevontena, Masindray, Soavinandriana District, Itasy, Madagascar
Anjanabonoina pegmatites, Ambohimanambola, Betafo District, Vakinankaratra, Madagascar
Habit: small < 1/2 mm large platy xls
Colour: colorless
Description: Found in cavities of corroded beryl
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 244 localities in this region.
Formula: Be3Al2(Si6O18)
Localities:
Maharitra, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Anjanabonoina pegmatites, Ambohimanambola, Betafo District, Vakinankaratra, Madagascar
Ankitsikitsika, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Formula: Be3Al2Si6O18
Localities: Reported from at least 20 localities in this region.
Formula: Be3Al2(Si6O18)
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 17 localities in this region.
Formula: Be3Al2(Si6O18)
Localities:
Zazafotsy, Ihosy District, Ihorombe, Madagascar
Andriamena Commune, Tsaratanàna District, Betsiboka, Madagascar
Fianarantsoa Province, Madagascar
Vatofotsy, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Vorondolo pegmatite field, Madagascar
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 8 localities in this region.
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Localities: Reported from at least 119 localities in this region.
Description: Late phase.
Formula: Bi2O3
Localities: Reported from at least 11 localities in this region.
Formula: Bi
Localities: Reported from at least 17 localities in this region.
Habit: small cleavable masses
Formula: Bi2S3
Localities: Reported from at least 15 localities in this region.
Formula: (BiO)2CO3
Localities: Reported from at least 30 localities in this region.
ⓘ 'Bismutomicrolite (of Hogarth 1977)'
Colour: greenish brown
Formula: Bi(Ta,Nb)O4
Formula: CaLiAl2(AlBeSi2O10)(OH)2
Localities: Reported from at least 10 localities in this region.
Habit: pseudohexagonal barrelshaped aggregates with curved top (polysyntetic twins)up to 2 mm long; fine lamelles
Colour: white; whith-yellowish
Description: The typematerial of bityite was found in a pegmatite dike situated about 300 m N of the Maharitra workings (Behier (1960) Found on tourmaline or quartz
Formula: AlO(OH)
Formula: Al16B6O30(Si2O7)
References:
Novák, Milan, Cempírek, Jan, Gadas, Petr, Škoda, Radek, Vašinová Galiová, Michaela, Pezzotta, Federico, Groat, Lee A. (2015) Boralsilite and Li, Be-bearing "Boron Mullite" Al8B2Si2O19, Breakdown products of spodumene from the Manjaka pegmatite, Sahatany valley, Madagascar. The Canadian Mineralogist, 53 (2) 357-374 doi:10.3749/canmin.1400092
Formula: Cu5FeS4
Localities: Reported from at least 9 localities in this region.
Description: Described by Behier (1963) under the name erubescite
Formula: PdPt3S4
Formula: Mn2+Mn3+6(SiO4)O8
Formula: (Ce,Ca)5(SiO4)3OH
Formula: (REE,Ca)5[(Si,P)O4]3X
Colour: colourless
Description: Excact locality not known. Found together with pyrochlore, fluorite, quartz and fergusonite in an alkaline rock
Formula: Cu4(SO4)(OH)6
Localities:
Matsaborivaky, Milanoa Commune, Vohémar District, Sava, Madagascar
Pachoud Mine, Ambatofangehana, Andakatany, Manandriana District, Amoron'i Mania, Madagascar
Milanoa, Milanoa Commune, Vohémar District, Sava, Madagascar
Formula: (Ca,Th,Ce)PO4 · H2O
Formula: TiO2
Localities:
River alluvials, Ambanja, Diana, Madagascar
Fitampito brookite locality, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Bekolosy Massif, Manongarivo Massif, Djangoa Commune, Ambanja, Diana, Madagascar
Bevato Massif, Bevato Commune, Tsiroanomandidy District, Bongolava, Madagascar
Formula: CaCO3
Localities: Reported from at least 108 localities in this region.
ⓘ Calcite var. Manganese-bearing Calcite
Formula: (Ca,Mn)CO3
Formula: (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Formula: (UO2)2Nb2O6(OH)2 · 2H2O
Description: Specimen offered by Gunnar Färber, no information on id has been provided, thus the unconfirmed status. ( (see Photo ID: 1094393)
Formula: K2(UO2)2(VO4)2 · 3H2O
Localities:
Antalio, Ankavandra, Miandrivazo, Menabe, Madagascar
Folakara area, Miandrivazo, Menabe, Madagascar
Honko Valley, Beravina, Morafenobe District, Melaky, Madagascar
Formula: SnO2
Localities: Reported from at least 15 localities in this region.
Formula: Na2Zr(Si3O9) · 2H2O
Formula: K(MgFe3+◻)(Si4O10)(OH)2
Localities:
Basalt outcrops S of Lake Kinkony, Antseza, Mitsinjo District, Boeny, Madagascar
Bekiady, Antseza, Mitsinjo District, Boeny, Madagascar
Maintirano District, Melaky, Madagascar
Ihovitra, Itremo, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Ambatofinandrahana District, Amoron'i Mania, Madagascar
Habit: nodules
Colour: greenblue
Description: In amygdales in basalt
Formula: SrSO4
Localities: Reported from at least 7 localities in this region.
Habit: Blocky to elongated, tapering and pointed, sharp wellformed crystals to 15 cm. Dominant forms: prism {210} moodified by {101} and {011}, + these and {100},{001},{111},{110}
Colour: Medium blue to pale blue to colorless with a bright luster
Formula: (Ce4+,Th)O2
Colour: mustard-brown to yellowish
Description: alteration film on bastnäsite-(Ce)
Formula: (Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3
Formula: PbCO3
Localities: Reported from at least 7 localities in this region.
Formula: ◻Nb2(O,OH)6(Cs,◻)
Type Locality:
Description: Found in a single sample as rough equant crystals up to 0.05 mm in size intergrown with behierite and rynersonite on the surface of a crystal of behierite.
References:
Agakhanov, Atali A., Kasatkin, Anatoly V., Britvin, Sergey N., Siidra, Oleg I., Pautov, Leonid A., Pekov, Igor V., Karpenko, Vladimir Yu. (2021) Cesiokenopyrochlore, the First Natural Niobate with an Inverse Pyrochlore Structure. The Canadian Mineralogist, 59 (1) 149-157 doi:10.3749/canmin.2000056
Localities: Reported from at least 13 localities in this region.
Description: in basaltic rock
Formula: (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Formula: CuSO4 · 5H2O
Localities: Reported from at least 6 localities in this region.
Formula: Cu2S
Localities: Reported from at least 10 localities in this region.
Formula: CuFeS2
Localities: Reported from at least 32 localities in this region.
Formula: Mn2+3(B7O13)Cl
Colour: Colorless
Description: Tiny inclusions in rhodizite-londonite.
References:
Laurs, Brendan M., Pezzotta, Federico, Simmons, William B. (Skip), Falster, Alexander U., Muhlmeister, Sam (2002) Rhodizite-Londonite from the Antsongombato Pegmatite, Central Madagascar. Gems & Gemology, 38 (4) 326-339 doi:10.5741/gems.38.4.326
Formula: CaTh(PO4)2
Description: Inclusions in sapphire.
Formula: Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2
Localities:
Soavinandriana District, Itasy, Madagascar
Ampasibitika, Antsirabe, Ambanja, Diana, Madagascar
Ambohimirahavavy Alkaline Complex, Antsirabe, Ambanja, Diana, Madagascar
Estatoby (Antanetinilapa), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Localities: Reported from at least 9 localities in this region.
Description: J.Behier (1963) uses the name and spelling "tscheffkinite".
Formula: CaMnBe2Si5O13(OH)2 · 2H2O
References:
Formula: Ca5(PO4)3Cl
Formula: AgCl
Localities: Reported from at least 29 localities in this region.
ⓘ 'Chloropal (of Schneiderhöhn)'
Description: Inclusions in corundum.
Formula: Fe2+Cr3+2O4
Localities: Reported from at least 9 localities in this region.
Formula: BeAl2O4
Localities: Reported from at least 35 localities in this region.
ⓘ Chrysoberyl var. Alexandrite
Formula: BeAl2O4
Formula: BeAl2O4
Localities:
Analadihirina, Miandrivazo, Menabe, Madagascar
Antanetibe, Morafeno Commune, Maevatanana District, Betsiboka, Madagascar
Andanoa, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Marivolanitra, Andranomiady, Ankazobe District, Analamanga, Madagascar
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Localities: Reported from at least 11 localities in this region.
Formula: Mg3(Si2O5)(OH)4
Localities: Reported from at least 10 localities in this region.
Formula: Y(PO4) · 2H2O
Formula: Bi(VO4)
Formula: Mg5Al(AlSi3O10)(OH)8
Localities: Reported from at least 16 localities in this region.
ⓘ Clinochlore var. Leuchtenbergite
Formula: Mg5Al(AlSi3O10)(OH)8
Localities:
Beramy, Amborompotsy Commune, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Ambatomainty, Ambatomainty, Ikalamavony District, Haute Matsiatra, Madagascar
Ampitsinjovana, Amborompotsy Commune, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Andriamena complex, Andriamena Commune, Tsaratanàna District, Betsiboka, Madagascar
Anosifito, Solila, Ikalamavony District, Haute Matsiatra, Madagascar
Formula: Mg5Al(AlSi3O10)(OH)8
Formula: (Mg,Fe,Al)6(Si,Al)4O10(OH)8
Formula: Mg9(SiO4)4F2
Formula: M3-6(Si30Al6)O72 · 20H2O
Description: Earlier erronously labeled as heulandite (Lefevre & Thomas (1998).
Localities: Reported from at least 10 localities in this region.
Description: Close to Mg end-member in composition
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Description: A sample in the collection of Muséum de Paris, France, see http://webmineral.brgm.fr:8003/mineraux/ImageView.html?SYSID\_IMAGE=7312&TARGET=MainEnd
ⓘ Clinozoisite var. Clinothulite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Formula: CaAlMg2(SiAl3O10)(OH)2
Formula: CoAsS
Description: Behier (1960) describes a specimen with cobaltite that has been found by Picot (1957) at "Milanoa". Behier belives that this locality is the same as Mahasaborivaky.
Formula: Fe2+Nb2O6
Localities: Reported from at least 10 localities in this region.
ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series'
Localities: Reported from at least 41 localities in this region.
Formula: (Mg,Fe,Mn)(Nb,Ta)2O6
Description:
Formula: Mn2+Nb2O6
Localities: Reported from at least 14 localities in this region.
ⓘ 'Columbite-(Mn)-Tantalite-(Mn) Series'
Localities:
Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar
Estatoby (Antanetinilapa), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Ilontsa (Ilotsa), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Fiakarandava pegmatite, Sahatsiho Ambohimanjaka, Ambositra, Amoron'i Mania, Madagascar
Description: See Pavel M. Kartashov comments on columbite-(Mn) in the caption of photo http://www.mindat.org/photo-114523.html.
Localities: Reported from at least 46 localities in this region.
Formula: (LiAl4◻)[AlSi3O10](OH)8
Localities: Reported from at least 9 localities in this region.
Formula: PtS
Formula: Cu
Localities:
Matsaborivaky, Milanoa Commune, Vohémar District, Sava, Madagascar
Bevalaha Cu deposit, Belamoty, Betioky District, Atsimo-Andrefana, Madagascar
Bekiady, Antseza, Mitsinjo District, Boeny, Madagascar
Antalaha District, Sava, Madagascar
Description: large masses partially altered to cuprite.
Formula: (Mg,Fe)2Al3(AlSi5O18)
Localities: Reported from at least 24 localities in this region.
Formula: Al2O3
Localities: Reported from at least 92 localities in this region.
Habit: elongated prismatic, normally simple hexagonal prism, but also complex combinations of pyramid, rhombohedron and small pinacoids,
Colour: red, blue, violet
Description: Western zone: The corundum occurs evenly distributed in the rock with no preferred orientation, and can be found in well developed crystals in various ruby red color tones, sized from 1 to 4 cm in size, averaging around 2,5cm. The crystals are generally elongated prismatic with a length and diameter ratio of from 2:1 to 3:1, but the crystal shape can be anything from a simple hexagonal prism to complex combinations of pyramid, rhombohedron and small pinacoids, and the crystal shape is randomly variable throughout this zone, and even crystals found near each other may have completely different crystal shapes.Eastern Zone: The corundum here is also more diverse, both in color and size. The crystals can be up to decimenter size and of various reddish, violtet and blue colors, sometimes completely enclosed of a potassium fedlspar halo (3-4mm-1cm thickness). Some of the crystals are also multicolored with shades of purple and red in the same crystal. Some of the larger multicolored crystals show a star-like feature with six scarlet arms pointing towards the centre of the prism face, with blue edges on the sectors between the "star arms". As a rarity, Pezzotta describes crystals to 2cm, with a remarkably intense blue color and high-gloss face, with adamantine luster, partially or totally enclosed in a casing of rhodolite garnet. Part of the face of these crystals are fully developed, but have developed in the competition with garnet creating complex growth structures
Formula: Al2O3
Formula: Al2O3
Localities: Reported from at least 17 localities in this region.
Formula: Al2O3
Localities: Reported from at least 31 localities in this region.
Habit: Rounded nodules
Colour: Blue, yellow
Description: Found about 2015. Cut gemstones to 50 carats produced by 2017. Exceptionally high quality deep blue sapphire equivalent in quality to "Kashmir" sapphire. Fine clean blue stones over 100 carats and some attractive pinkish orange stones over 50 carats
Formula: Pb2Bi2S5
Formula: CuS
Localities: Reported from at least 7 localities in this region.
Formula: Sr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38
Formula: K(Mn4+7Mn3+)O16
Localities:
Sakavalana mine, Ambatovita, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar
Formula: CuFe2S3
Description: As exsolutions in chalcopyrite
Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2
Formula: Cu2O
Localities:
Matsaborivaky, Milanoa Commune, Vohémar District, Sava, Madagascar
Bevalaha Cu deposit, Belamoty, Betioky District, Atsimo-Andrefana, Madagascar
Besakoa Cu deposit, Ianapera, Benenitra District, Atsimo-Andrefana, Madagascar
Bekiady, Antseza, Mitsinjo District, Boeny, Madagascar
Formula: (Cu1+0.5Fe3+0.5)Rh3+2S4
Formula: Pb3(H2O)2[(UO2)4O4(OH)3]2
Localities:
Bemasoandro pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Ambodibonara pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar ? (more information)
Adaboroa pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar ? (more information)
Malakialina pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar ? (more information)
Formula: NaFe3+3(PO4)2(OH)4 · 2H2O
Formula: CaB2Si2O8
Localities: Reported from at least 19 localities in this region.
Formula: Na(Al2Li)Al6(Si6O18)(BO3)3(OH)3O
References:
Gadas, P., Novák, M., Vašinová Galiová, M., Pezzotta, F. (2023) Chemical composition of tourmalines from the Manjaka pegmatite and its exocontact, Sahatany Valley, Madagascar. Journal of Geosciences, 68 (3) 185-202 doi:10.3190/jgeosci.374
Description: J.Behier (1963) uses the variety name "mazuvite".
Formula: (Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Formula: H2Pb3(UO2)6O4(PO4)4 · 12H2O
Description: A mineral in the phosphuranylite-"renardite" series which contained 10 p. 100 PbO was interpreted by Behier (1960) as a renardite = dewindtite
Formula: C
Formula: AlO(OH)
Localities:
Andranondambo sapphire deposits, Maromby, Amboasary Sud District, Anosy, Madagascar
Matory, Ambahy, Nosy Varika, Vatovavy Fitovinany, Madagascar
Manivala (Sahambano corundum deposit), Sahambano, Ihosy District, Ihorombe, Madagascar
Formula: Cu9S5
Formula: CaMgSi2O6
Localities: Reported from at least 77 localities in this region.
Formula: CaMgSi2O6
Formula: CaMg(CO3)2
Localities: Reported from at least 10 localities in this region.
Formula: NaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Localities: Reported from at least 17 localities in this region.
References:
Novák, Milan, Cempírek, Jan, Gadas, Petr, Škoda, Radek, Vašinová Galiová, Michaela, Pezzotta, Federico, Groat, Lee A. (2015) Boralsilite and Li, Be-bearing "Boron Mullite" Al8B2Si2O19, Breakdown products of spodumene from the Manjaka pegmatite, Sahatany valley, Madagascar. The Canadian Mineralogist, 53 (2) 357-374 doi:10.3749/canmin.1400092
Formula: Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
Formula: Al(Al2O)(Al2O)2(SiO4)3(BO3)
Localities: Reported from at least 14 localities in this region.
Habit: small fibrous masses
Colour: lavendel blue
Formula: Ag3Sb
Formula: NaNa2(Mg4Al}Si8O22(OH)2
Description: Need to be checked if it can be assigned to eckermannite according to the redefinition by IMA (IMA2013-136).
Formula: NaCa2Mg5(Si7Al)O22(OH)2
Localities: Reported from at least 10 localities in this region.
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Localities: Reported from at least 23 localities in this region.
Colour: pink, green, brown
Description: See comments under tourmaline entry at Antandrokomby locality page. Ranorosoa (1986, 1989) analyzes pink,green and brownish colored tourmaline found in the contactzone and she find these to be elbaite, one an elbaite with 2,44wt% MnO. The brown colored gave this formula Na0,52Ca0,38)0,90(Li1,45Mn0,34Fe0,08Al1,77)3,64Al6,00(BO3)3,00Si6,00O18(OH3,63F0,09)3,72. Simmons et al (2001) states that tourmalines from Antandrokomby are members of the schorl-elbaite series with significant Mg and Ca contents.
ⓘ 'Elbaite-Liddicoatite Series'
Localities:
Anjahamiary pegmatite, Tranomaro, Amboasary Sud District, Anosy, Madagascar
Anjanabonoina pegmatites, Ambohimanambola, Betafo District, Vakinankaratra, Madagascar
Ambalabe pegmatite, Manapa pegmatite Field, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar
Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar ? (more information)
Sarodivotra, Anjanabonoina pegmatites, Ambohimanambola, Betafo District, Vakinankaratra, Madagascar ? (more information)
Formula: Mg2Si2O6
Localities: Reported from at least 7 localities in this region.
Formula: (Mg,Fe2+)2[SiO3]2
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Localities: Reported from at least 27 localities in this region.
Formula: OsS2
Formula: NaAl3Al6(Si4B2O18)(BO3)3(OH)3O
Type Locality:
References:
Formula: BeAl(SiO4)(OH)
Localities:
Euclase locality, Mananasy, Soavinandriana District, Itasy, Madagascar
Andilamena District, Alaotra-Mangoro, Madagascar
Anjanabononoia, Manapa pegmatite Field, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar
Mananasy, Soavinandriana District, Itasy, Madagascar
Tsiroanomandidy District, Bongolava, Madagascar
Formula: Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Localities: Reported from at least 6 localities in this region.
Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Localities: Reported from at least 59 localities in this region.
Formula: Al3(PO4)(OH)6 · 6H2O
Habit: colloform
Colour: white
Type Locality:
Habit: massive
Colour: white creme
Description: The typematerial of the now discredited faratshite was found in a roadcut about 10 km from Faratsiho on the road to Sambaina. It was found in an altered volcanique rock (basalt or trachyte)as an elliptical mass of 2 x 1 meter
Formula: Fe2+2SiO4
ⓘ 'Fayalite-Forsterite Series'
Localities: Reported from at least 16 localities in this region.
Localities: Reported from at least 71 localities in this region.
Colour: Pink to reddish
Description: Perthitic K-Feldspar. Sometimes Graphic Granite intergrowths with white/smoky Quartz
ⓘ 'Feldspar Group var. Antiperthite'
ⓘ 'Feldspar Group var. Perthite'
Localities: Reported from at least 34 localities in this region.
Colour: Pink to reddish
Description: Perthitic K-Feldspar. Sometimes Graphic Granite intergrowths with white/smoky Quartz
Formula: FeWO4
Localities: Reported from at least 19 localities in this region.
Formula: YNbO4
Localities: Reported from at least 8 localities in this region.
Formula: (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH)
Formula: (La6Ca3)◻Fe3+(SiO4)3(SiO3OH)4(OH)3
References:
Formula: ◻(NaCa)(Mg4Fe3+)Si8O22(OH)2
Description: Deep black-blue bladed single crystals embedded in dolomite
Formula: NaNa2(Fe2+4Al)Si8O22(OH)2
Formula: NaCa2Fe2+5(Si7Al)O22(OH)2
Formula: Na(Na2)(Fe2+2Fe3+2Li)(Si8O22)(F)2
Formula: [(Fe2+,Mg,Zn,Al)3(Al,Ti,Fe3+)8O15(OH)]2
Localities: Reported from at least 7 localities in this region.
Formula: (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Formula: CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
Description: No published analysis or other information. Samples visually identical to samples sold as feruvite in mineral shows has showed to be dravite.(K.E.Larsen commment des 2011)
References:
Rasoamalala, V., Salvi, S., Béziat, D., Ursule, J.-Ph., Cuney, M., de Parseval, Ph., Guillaume, D., Moine, B., Andriamampihantona, J. (2014) Geology of bastnaesite and monazite deposits in the Ambatofinandrahana area, central part of Madagascar: An overview. Journal of African Earth Sciences, 94. 128-140 doi:10.1016/j.jafrearsci.2013.11.009
Formula: Ca5(PO4)3F
Localities: Reported from at least 17 localities in this region.
ⓘ Fluorapatite var. Manganese-bearing Fluorapatite
Formula: (Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Localities:
Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar
Vohidahy, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Ilontsa (Ilotsa), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Ambatorangotina pegmatite, Itremo, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Manjaka, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Colour: blue; Prusse blue
Description: A. Lacroix (1912) suggest that the blue tourmaline mentioned by Duparc et al(1910) is a misnomer for "manganapatite" which occured abundantly at the locality.
Formula: KCa4(Si8O20)(F,OH) · 8H2O
Formula: (Ce,Ca)5(SiO4)3F
Formula: (Ca,Na)2(Nb, Ti)2O6F
Formula: NaMg3Al6(Si6O18)(BO3)3(OH)3F
References:
Gadas, P., Novák, M., Vašinová Galiová, M., Pezzotta, F. (2023) Chemical composition of tourmalines from the Manjaka pegmatite and its exocontact, Sahatany Valley, Madagascar. Journal of Geosciences, 68 (3) 185-202 doi:10.3190/jgeosci.374
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F
Localities:
Anjanabonoina pegmatites, Ambohimanambola, Betafo District, Vakinankaratra, Madagascar
Tsarafara Nord (Ambalaroy), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Manjaka, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Formula: CaF2
Localities: Reported from at least 31 localities in this region.
Formula: Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3F
Localities: Reported from at least 6 localities in this region.
Formula: (Na,Pb,Ca,REE,U)2Nb2O6F
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22F2
Formula: CaCa2(Mg4Al)(Si5Al3)O22F2
Description: Found in a metamorphic U-rich thorianite bearing pyroxenite near Tranomaro. (Lapis 21 (11): 45. Set as questionable due to lack of analytic evidence.
Formula: NaCa2(Mg4Al)(Si6Al2)O22F2
Formula: KMg3(Si3Al)O10F2
Formula: CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3F
References:
Gadas, P., Novák, M., Vašinová Galiová, M., Pezzotta, F. (2023) Chemical composition of tourmalines from the Manjaka pegmatite and its exocontact, Sahatany Valley, Madagascar. Journal of Geosciences, 68 (3) 185-202 doi:10.3190/jgeosci.374
Localities:
Marirana Pegmatites (Andasy), Marirana, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Vohimena hill, Sahambano, Ihosy District, Ihorombe, Madagascar
Green Giant Vanadium Property, Atsimo-Andrefana, Madagascar
Colour: green
Description: Found in the Marirana South pegmatite. One small fragment of green tourmaline was analyzed by (Ranorosoa 1986) and found to be an uvite
Formula: Mg2SiO4
Localities:
Lavatrafo, Morafeno Commune, Maevatanana District, Betsiboka, Madagascar
Itrafo, Ampanivana area, Andrembesoa, Betafo District, Vakinankaratra, Madagascar
Marosohy thorianite deposit, Belafa area, Maromby, Amboasary Sud District, Anosy, Madagascar
Bazaribe, Andranondambo sapphire deposits, Maromby, Amboasary Sud District, Anosy, Madagascar
Antanimora Sud Commune, Ambovombe-Androy, Androy, Madagascar
Description: Olivine with Fo84-87
Formula: ZnAl2O4
Formula: PbS
Localities: Reported from at least 21 localities in this region.
Formula: X3Z2(SiO4)3
Localities: Reported from at least 70 localities in this region.
Localities:
Valozoro lateritic nickel deposit, Fiadanana, Ambohimahasoa District, Haute Matsiatra, Madagascar
Ambatovy, Ambohibary, Moramanga District, Alaotra-Mangoro, Madagascar
Ampangabe-Jabo, Ambohidratrimo District, Analamanga, Madagascar
Ambolotarabe Deposit (Nickelville), Ambohitsilaozana, Ambatondrazaka District, Alaotra-Mangoro, Madagascar
Formula: ◻{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
Formula: Al(OH)3
Localities: Reported from at least 6 localities in this region.
Formula: CaZrSi2O7
Formula: ◻[Na2][Mg3Al2]Si8O22(OH)2
References:
Habit: 1-2 cm large xls
Formula: α-Fe3+O(OH)
Localities: Reported from at least 20 localities in this region.
Formula: Au
Localities: Reported from at least 30 localities in this region.
Formula: (Au,Ag)
Formula: Ca3V3+2(SiO4)3
Formula: NaCa6Ti(Si2O7)2OF3
Formula: SrAl3(PO4)(PO3OH)(OH)6
Localities:
Tsiambenana Quarry, Itremo, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Col d'Itremo, Itremo, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Analambano, Ibity massif, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Habit: as a rim of grains around lazulite
Formula: Fe2+Fe2+2(PO4)2
Localities:
Marivolanitra pegmatite, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Ampandramaika pegmatite, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Ambatoharanana pegmatite (Androfia), Manakana Commune, Tsaratanàna District, Betsiboka, Madagascar
Bemokoto pegmatite (Bemakoto), Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Formula: (Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Localities: Reported from at least 15 localities in this region.
Habit: masses up to several centimeters across
Colour: Bluish green
Description: C. Mignot was not able to find any more grandidierite at the site in 1960 (Behier 1960)
Formula: C
Localities: Reported from at least 26 localities in this region.
Formula: Ca3Al2(SiO4)3
Localities: Reported from at least 16 localities in this region.
Formula: Ca3Al2(SiO4)3
Formula: Ca3Al2(SiO4)3
Localities: Reported from at least 8 localities in this region.
Formula: ◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Localities:
Malakialina pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Bemasoandro pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Ambodibonara pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Befarafara, Maromokotra Commune, Vohémar District, Sava, Madagascar
Formula: CaSO4 · 2H2O
Localities: Reported from at least 12 localities in this region.
Formula: Al2(Si2O5)(OH)4
Localities:
Ampanihy rhodonite deposits, Ampanihy District, Atsimo-Andrefana, Madagascar
Bezavona Massif, Anorotsangana, Ambanja, Diana, Madagascar
Antsakoa I pegmatite, Bekapaika Commune, Tsaratanàna District, Betsiboka, Madagascar
Formula: Be2(BO3)(OH)
Localities: Reported from at least 13 localities in this region.
Description: A. Lacroix (1912) mentions a single crystal that measured 9 x 5,5 x 3 cm
Formula: NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
Localities:
Ampataka, Antsirabe I District, Vakinankaratra, Madagascar
Ambano Pegmatite, Ambano Commune, Antsirabe II District, Vakinankaratra, Madagascar
Makaraingobe Occurrence, Sarodrano, Ambatomainty District, Melaky, Madagascar
Formula: Na3Ca(Si3Al3)O12(SO4)
Localities: Reported from at least 6 localities in this region.
Formula: Ni3S2
References:
Formula: CaFe2+Si2O6
Localities:
Isoky phlogopite mine, Beraketa, Bekily District, Androy, Madagascar
Andranondambo sapphire deposits, Maromby, Amboasary Sud District, Anosy, Madagascar
Ambohiby Massif, Ambatolampy Commune, Tsiroanomandidy District, Bongolava, Madagascar
Massif d'Ambre, Diana, Madagascar
ⓘ Hedenbergite var. Ferrosalite
Formula: Fe2O3
Localities: Reported from at least 52 localities in this region.
Formula: Fe2O3
Localities:
Andakatany Deposit, Andakatany, Manandriana District, Amoron'i Mania, Madagascar
Miakanjovato pegmatite, Ambolotarakely, Ankazobe District, Analamanga, Madagascar
Ampasibitika, Antsirabe, Ambanja, Diana, Madagascar
Ambatovy, Ambohibary, Moramanga District, Alaotra-Mangoro, Madagascar
Ampangabe-Jabo, Ambohidratrimo District, Analamanga, Madagascar
Formula: Fe2+Al2O4
Localities: Reported from at least 6 localities in this region.
Description: Green hercynite+quartz assemblages (high-grade metamorphism). Hercynite : 0.6% ZnO, 0.4% Cr2O3.
ⓘ Hercynite var. Chromohercynite
Formula: Fe(Al,Cr)2O4
Formula: (Fe3+,Mn3+)PO4
Description: Listed by Behier (1963)
ⓘ 'Heterosite-Purpurite Series'
Formula: (Ca,Na)5(Si27Al9)O72 · 26H2O
Formula: (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Localities: Reported from at least 12 localities in this region.
Formula: CaAl12O19
Localities: Reported from at least 17 localities in this region.
Description: per correspondence with Knut Edvard: The TL produced just a few specimens in the year of discovery (also an eluvial locality ). When lacking exact locality data the Madagascar hibonite specimens are often erroneously labeled and sold as coming from Esiva, often being the only locality referred to in textbooks.
Formula: Ba(Mn4+6Mn3+2)O16
Formula: (Rh,Pt,Pd)AsS
Localities:
Ambodibonara Placer, Antanambao-Manampotsy area, Antanambao Manampotsy District, Atsinanana, Madagascar
Antanambao-Manampotsy area, Antanambao Manampotsy District, Atsinanana, Madagascar
Lavatrafo, Morafeno Commune, Maevatanana District, Betsiboka, Madagascar
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
Localities: Reported from at least 10 localities in this region.
Formula: MnWO4
Localities:
Antandrokomby pegmatite, Manandona Valley, Sahatsiho Ambohimanjaka, Ambositra, Amoron'i Mania, Madagascar
Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar
Sahatany Pegmatite Field (Mt Ibity area), Madagascar
Ilontsa (Ilotsa), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Formula: Fe2+(C2O4) · 2H2O
Description: Found as yellow crystals on dinosaur coprolite, from the association with siderite ( From Southern part of Madagascar ??)
Formula: Mg7(SiO4)3F2
Localities: Reported from at least 8 localities in this region.
Formula: Mn2+5(PO3OH)2(PO4)2 · 4H2O
Formula: (◻,x)2Nb2O6(H2O,Cs)
Type Locality:
References:
Biagioni, Cristian, Meisser, Nicolas, Nestola, Fabrizio, Pasero, Marco, Robyr, Martin, Roth, Philippe, Schnyder, Cédric, Gieré, Reto (2018) Hydrokenopyrochlore, (□,#)2Nb2O6·H2O, a new species of the pyrochlore supergroup from the Sahatany Pegmatite Field, Antananarivo Province, Madagascar. European Journal of Mineralogy, 30 (4) 869-876 doi:10.1127/ejm/2018/0030-2761
Formula: (◻,Na,Sb3+)2Ta2O6(OH,Cs)
Formula: Zn5(CO3)2(OH)6
Formula: (Mg,Fe)SiO3
Formula: Fe2+TiO3
Localities: Reported from at least 29 localities in this region.
Description: Niobian ilmenite.
ⓘ 'Ilmenorutile-Strüverite Series'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Formula: (Ir,Ru,Rh,Pt)AsS
Formula: Pt3Fe
Formula: Pd11Sb2As2
References:
McDonald, I., Ohnenstetter, D., Ohnenstetter, M., Vaughan, D. J. (1999) Palladium oxides in ultramafic complexes near Lavatrafo, Western Andriamena, Madagascar. Mineralogical Magazine, 63 (3) 345-352 doi:10.1180/002646199548565
ⓘ 'Ixiolite-(Mn2+)-Ixiolite-(Fe2+) Series'
Localities: Reported from at least 6 localities in this region.
ⓘ 'Ixiolite-(Mn2+)-Ixiolite-(Fe2+) Series var. Scandian Ixiolite (of von Knorring)'
Formula: (Nb,Ta,Ti,Sc,Fe,Mn)4O8
ⓘ 'Ixiolite-(Mn2+)-Ixiolite-(Fe2+) Series var. Wolframoixiolite'
Formula: (Nb,W,Ta,Fe,Mn)2O4
Localities:
Manjaka, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Ilontsa (Ilotsa), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Description: (Mn1,63Ta1,10W0,79Nb0,50)4,02 O8 (Ranorosoa 1986)
Formula: KFe3+3(SO4)2(OH)6
Localities:
Marivolanitra pegmatite, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Besakoa Cu deposit, Ianapera, Benenitra District, Atsimo-Andrefana, Madagascar
Ampandrana, Ambositra, Amoron'i Mania, Madagascar
Tongobory, Tongobory Commune, Betioky District, Atsimo-Andrefana, Madagascar
Localities: Reported from at least 10 localities in this region.
Formula: Al6(BO3)5(F,OH)3
Formula: NaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Formula: Al2(Si2O5)(OH)4
Localities: Reported from at least 16 localities in this region.
Formula: V3+2O3
Formula: Ir2S3
Formula: {Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Formula: Pd20Te7
Localities: Reported from at least 44 localities in this region.
Formula: KAlSi3O8
Formula: Mg3Al6(Si,Al,B)5O21(OH)
Localities: Reported from at least 11 localities in this region.
Habit: prismatic crystals up to 3-4cm long and 1cm thick. The prisms show the faces {100}, {010} and {110}. End faces are extremely rare and poorly developed. Only {111} could be identified.
Formula: Al2(SiO4)O
Localities: Reported from at least 20 localities in this region.
Formula: (Ca,Sr)(Mg,Fe2+)2Al(P[O,F]4)3
Type Locality:
References:
Rondeau, Benjamin, Devouard, Bertrand, Jacob, Damien, Roussel, Pascal, Stephant, Nicolas, Boulet, Constance, Mollé, Valentin, Corre, Marianna, Fritsch, Emmanuel, Ferraris, Cristiano, Parodi, Gian Carlo (2019) Lasnierite, (Ca,Sr)(Mg,Fe)2Al(PO4)3, a new phosphate accompanying lazulite from Mt. Ibity, Madagascar: an example of structural characterization from dynamical refinement of precession electron diffraction data on submicrometre sample. European Journal of Mineralogy, 31 (2) 379-388 doi:10.1127/ejm/2019/0031-2817
Formula: CaAl2Si4O12 · 4H2O
Localities: Reported from at least 11 localities in this region.
Formula: K◻2Mg2(Be2Al)[Si12O30]
Type Locality:
References:
Ferraris, Cristiano, Pignatelli, Isabella, Cámara, Fernando, Parodi, Giancarlo, Pont, Sylvain, Schreyer, Martin, Wei, Fengxia (2020) Laurentthomasite,Mg2K(Be2Al)Si12O30: a new milarite-group-type member from the Ihorombe region, Fianarantsoa Province, Madagascar. European Journal of Mineralogy, 32 (3) 355-365 doi:10.5194/ejm-32-355-2020
Formula: RuS2
Localities:
Ambodibonara Placer, Antanambao-Manampotsy area, Antanambao Manampotsy District, Atsinanana, Madagascar
Antanambao-Manampotsy area, Antanambao Manampotsy District, Atsinanana, Madagascar
Ranomena, Sahambala, Toamasina II District, Atsinanana, Madagascar
Formula: Na2Ca2Mn2Zr2(Si2O7)2O2F2
Formula: MgAl2(PO4)2(OH)2
Localities: Reported from at least 12 localities in this region.
Formula: NaNa2(Mg2Al2Li)(Si8O22)(OH)2
Formula: γ-Fe3+O(OH)
Localities:
Antsakoanimanta (Mangatobangy), Mangataboahangy, Ambatofinandrahana District, Amoron'i Mania, Madagascar ? (more information)
Ambatomanoina, Ambatomanoina Commune, Anjozorobe District, Analamanga, Madagascar ? (more information)
Unspecified amethyst sceptre locality, Tsitondroina, Ikalamavony District, Haute Matsiatra, Madagascar ? (more information)
Description: Probably hematite; Lepidocrocite has never been positively identified as an inclusion in quartz (Pers.com John S. White)
Localities: Reported from at least 22 localities in this region.
Formula: K(AlSi2O6)
Localities:
Bezavona Massif, Anorotsangana, Ambanja, Diana, Madagascar
Nosy Komba, Nosy Be, Diana, Madagascar
Nosy-Be Island, Nosy Be, Diana, Madagascar
Takarindoha Volcanic Field, Ambalavolo, Vatomandry District, Atsinanana, Madagascar
Formula: KFe3+2(PO4)2(OH) · 2H2O
Habit: small violette crystals or as small green masses in phosphate nodules
Formula: U(Nb,Ta)2O8
Type Locality:
Colour: yellow to brown
Description: As a 2mm thick crust on petscheckite
Formula: Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Localities: Reported from at least 15 localities in this region.
Colour: green
Description: Determined from a green zone inside a pink elbaite (Ranorosoa 1986)
Localities: Reported from at least 15 localities in this region.
Formula: Co2+Co3+2S4
Formula: Fe2+Fe3+2(PO4)2(OH)2
Habit: Forming a thin film on altered triplite
Colour: green-yellow
Description: Analysis (XRD) by M.E.Rose.
Formula: LiMn2+PO4
Localities:
Manjaka, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Marivolanitra pegmatite, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Bemokoto pegmatite (Bemakoto), Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Tsarafara Sud (Ankadilava), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar ? (more information)
Description: Pink, translucent, prismatic crystals (rare) or masses in albite. Often with an aureole of manganese oxides.
Formula: Mg3(Si2O5)(OH)4
ⓘ Lizardite var. Nickel-bearing Lizardite
Formula: (Mg,Ni)3(Si2O5)(OH)4
Formula: (Cs,K,Rb)Al4Be4(B,Be)12O28
Localities: Reported from at least 7 localities in this region.
Habit: Dodecahedron {110}, tristetrahedron {211}, tetrahedron{111} and cube {100} (the last form is rare}
Colour: Milky to pale yellow crystals up to 1 cm
Description: Occurs in saccharoidal albite or in cavities. Many crystals contain patchy zones of londonite and rhodizite that are only visible by back-scattered electron imaging.
ⓘ 'Londonite-Rhodizite Series'
Localities: Reported from at least 14 localities in this region.
Habit: Forms: Dodecahedral {110} faces modified by deltoid dodecahedral {221}, tristetrahedral {211}, and tetrahedral {111} faces, rarely cubic {100} faces.
Colour: Pale yellowish greenish
Description: Specimens of rhodizite/londonite, when not individually determined chemically from this locality should be designed londonite-rhodizite series. Crystal up to 10 cm across found frozen in pegmatite matrix, in the more chemical evolved portions of the dikes charcateized by green and red tourmaline
Formula: (Fe3+0.67◻0.33)Fe3+2O4
Formula: {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2
Localities:
Ambatoarina, Andakatany, Manandriana District, Amoron'i Mania, Madagascar
Andakatany Deposit, Andakatany, Manandriana District, Amoron'i Mania, Madagascar
Ambohiby Massif, Ambatolampy Commune, Tsiroanomandidy District, Bongolava, Madagascar
Ambatoarina area, Ambatoarina, Andakatany, Manandriana District, Amoron'i Mania, Madagascar
Formula: MgCr2O4
Formula: ◻(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Description: Black (internally very dark brown), highly, lustrous crystals from 3.8 to 9.8 cm, where found in a large collapsed pocket in an unspecified locality in the Tsitondroina area in 2010. These were first thought to be schorl, but according to Moore (2014) they has been analysed and found to be magnesio-foitite. However, no further information was given about the analytical methods used to establish this identity.
Formula: ◻Ca2(Mg4Al)(Si7Al)O22(OH)2
References:
Formula: CaMg3Al6(Si6O18)(BO3)3(OH)3O
References:
Gadas, P., Novák, M., Vašinová Galiová, M., Pezzotta, F. (2023) Chemical composition of tourmalines from the Manjaka pegmatite and its exocontact, Sahatany Valley, Madagascar. Journal of Geosciences, 68 (3) 185-202 doi:10.3190/jgeosci.374
Formula: ◻{Na2}{Mg3Fe3+2}(Si8O22)(OH)2
Description: described as Torendrikite
Formula: Mg3Al8BeO16
Habit: colourless grains
Formula: Mg2BeAl6O12
Formula: MgCO3
Localities:
Ambindavato, Soamanonga, Betioky District, Atsimo-Andrefana, Madagascar
Vohibory, Ianapera, Benenitra District, Atsimo-Andrefana, Madagascar
Ampangabe-Jabo, Ambohidratrimo District, Analamanga, Madagascar
Lavatrafo, Morafeno Commune, Maevatanana District, Betsiboka, Madagascar
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 68 localities in this region.
ⓘ Magnetite var. Titanium-bearing Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
Localities:
Ankaratra Volcanic Range, Madagascar
Androy Volcanic Complex, Madagascar
Ambohimirahavavy Alkaline Complex, Antsirabe, Ambanja, Diana, Madagascar
Itasy Volcanic Field, Miarinarivo, Itasy, Madagascar
Takarindoha Volcanic Field, Ambalavolo, Vatomandry District, Atsinanana, Madagascar
Formula: Cu2(CO3)(OH)2
Localities: Reported from at least 14 localities in this region.
Formula: Li2Al4(Si2AlB)O10(OH)8
Localities:
Antandrokomby pegmatite, Manandona Valley, Sahatsiho Ambohimanjaka, Ambositra, Amoron'i Mania, Madagascar
Manjaka, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Marirana Pegmatites (Andasy), Marirana, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Habit: Flakes (sometimes with hexagonal contours)in fanlike globular aggregates
Colour: white
Description: white flakes with pearly lustre on the (001) cleavage.
Formula: Mn3+O(OH)
Formula: FeS2
Localities: Reported from at least 7 localities in this region.
Formula: Na4Al3Si9O24Cl
Formula: PbO
Description: As an alteration product of galena.
Formula: Ca4Al6Si6O24CO3
Localities: Reported from at least 7 localities in this region.
Formula: Ca2M(XSiO7)
Localities:
Amparafaravola, Amparafaravola Commune, Amparafaravola District, Alaotra-Mangoro, Madagascar
Alaotra Occurrences, Amparafaravola Commune, Amparafaravola District, Alaotra-Mangoro, Madagascar
Ankaratra Volcanic Range, Madagascar
Takarindoha Volcanic Field, Ambalavolo, Vatomandry District, Atsinanana, Madagascar
Formula: Na2Ca2Si9Al6O30 · 8H2O
Formula: AgSbS2
Localities: Reported from at least 12 localities in this region.
Formula: PdBiTe
Formula: K(AlSi3O8)
Localities: Reported from at least 74 localities in this region.
Formula: K(AlSi3O8)
Localities: Reported from at least 33 localities in this region.
Formula: A2-mTa2X6-wZ-n
Localities: Reported from at least 23 localities in this region.
Formula: K(◻H2O)Ca2(Be2Al)[Si12O30]
Formula: Na2SO4 · 10H2O
Formula: Ca2Fe3+3(PO4)3O2 · 3H2O
Colour: yellow-greenish to olive-green
Description: Identified by Miss M.E. Rose. As small pulvurent masses
Formula: MoS2
Localities: Reported from at least 23 localities in this region.
Formula: Ce(PO4)
Localities: Reported from at least 16 localities in this region.
Formula: REE(PO4)
Localities: Reported from at least 73 localities in this region.
Formula: La(PO4)
Habit: pulverulent
Colour: snow-white
Description: as alteration film on bastnäsite-(Ce) with cerianite-(Ce)
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Localities:
Maharitra, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Fiakarandava pegmatite, Sahatsiho Ambohimanjaka, Ambositra, Amoron'i Mania, Madagascar
Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar
Green Giant Vanadium Property, Atsimo-Andrefana, Madagascar
Formula: (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Formula: (Ca3REE)[(H2O)2Ca0.5◻0.5]Ti(Si2O7)2(OH)2(H2O)2
Formula: PbCu(VO4)(OH)
Formula: KAl2(AlSi3O10)(OH)2
Localities: Reported from at least 104 localities in this region.
Formula: KAl2(AlSi3O10)(OH)2
Habit: massive
Colour: light greenish
Formula: K(Al,Cr)3Si3O10(OH)2
Localities: Reported from at least 7 localities in this region.
Formula: KAl2(AlSi3O10)(OH)2
Localities:
Befanamo pegmatite, Beronono, Anjozorobe District, Analamanga, Madagascar
Ampangabé pegmatite, Miandrarivo, Faratsiho, Vakinankaratra, Madagascar
Sarondambo, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Amparangoaika pegmatite, Dabolava, Miandrivazo, Menabe, Madagascar
Description: small scales on microcline
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Formula: KAl2(AlSi3O10)(OH)2
Formula: Na3Ca3(Ce,REE)Nb(Si2O7)2OF3
Formula: NaHCO3
Formula: NaFe3(SO4)2(OH)6
Formula: Na2Al2Si3O10 · 2H2O
Localities:
Bekiady, Antseza, Mitsinjo District, Boeny, Madagascar
Madagascar
Ankazoberavina Island, Bemaneviky Ouest Commune, Ambanja, Diana, Madagascar
Ambatomainty diabase, Sarodrano, Ambatomainty District, Melaky, Madagascar
Andebadeba, Sarodrano, Ambatomainty District, Melaky, Madagascar
Formula: Na3K(Al4Si4O16)
Localities: Reported from at least 19 localities in this region.
Formula: ScNbO4
Type Locality:
References:
Lykova, Inna, Rowe, Ralph, Poirier, Glenn, McDonald, Andrew M., Giester, Gerald (2021) Nioboheftetjernite, ScNbO4, a new mineral from the Befanamo Pegmatite, Madagascar. The Canadian Mineralogist, 59 (2) 445-452 doi:10.3749/canmin.2000070
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Localities:
Marovato, Brickaville District, Atsinanana, Madagascar
Anosy, Madagascar
Volafolo, Amparafaravola District, Alaotra-Mangoro, Madagascar
Sahanavo graphite mine, Anjahamana, Brickaville District, Atsinanana, Madagascar
Formula: Na8(Al6Si6O24)(SO4) · H2O
Formula: SiO2 · nH2O
Localities: Reported from at least 22 localities in this region.
Formula: SiO2 · nH2O
Formula: SiO2 · nH2O
Formula: SiO2 · nH2O
Formula: SiO2 · nH2O
Formula: (Ce,La,Ca,Na,Th)4(Fe2+,Mg)2(Ti,Fe3+)3Si4O22
Formula: K(AlSi3O8)
Localities: Reported from at least 24 localities in this region.
Localities: Reported from at least 7 localities in this region.
Habit: euhedral to subhedral crystals characterized by the pyramidal faces {211}. Faces {101} not visible.
Colour: brownish
Description: The mineral represents a bronzite with (Fe, Mn): Mg = 15:85 and with Al largely substituting for Si.
Formula: K◻2Fe2+2Al3[Al2Si10O30]
Localities: Reported from at least 6 localities in this region.
Formula: Na(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
References:
Gadas, P., Novák, M., Vašinová Galiová, M., Pezzotta, F. (2023) Chemical composition of tourmalines from the Manjaka pegmatite and its exocontact, Sahatany Valley, Madagascar. Journal of Geosciences, 68 (3) 185-202 doi:10.3190/jgeosci.374
Formula: V3+2V4+O5
Formula: Pd2As
References:
McDonald, I., Ohnenstetter, D., Ohnenstetter, M., Vaughan, D. J. (1999) Palladium oxides in ultramafic complexes near Lavatrafo, Western Andriamena, Madagascar. Mineralogical Magazine, 63 (3) 345-352 doi:10.1180/002646199548565
Formula: ◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O
Description: Found as constituent of an bentonitic-like clay. XRD (By J. Millot et J. Lucas) showed the caly to concist of 40% attapulgite (= palygorskite) and the rest illite (Behier 1960)
Formula: NaCa2(Mg4Al)(Si6Al2)O22(OH)2
Localities: Reported from at least 8 localities in this region.
Formula: Ca(Ce/La/Nd/REE)2(CO3)3F2
Formula: CaCe2(CO3)3F2
Localities:
Itorendrika-Ifasina, Imorona valley, Itremo, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Ampasibitika, Antsirabe, Ambanja, Diana, Madagascar
Ambohimirahavavy Alkaline Complex, Antsirabe, Ambanja, Diana, Madagascar
Formula: NaCa2Si3O8(OH)
Formula: (NixFey)Σ9S8
Formula: CaTiO3
Localities:
Amparafaravola, Amparafaravola Commune, Amparafaravola District, Alaotra-Mangoro, Madagascar
Esira, Amboasary Sud District, Anosy, Madagascar
Alaotra Occurrences, Amparafaravola Commune, Amparafaravola District, Alaotra-Mangoro, Madagascar
Ankaratra Volcanic Range, Madagascar
Takarindoha Volcanic Field, Ambalavolo, Vatomandry District, Atsinanana, Madagascar
Formula: Ce4MgFe3+2Ti2(Si2O7)2O8
Formula: UFe(Nb,Ta)2O8
Type Locality:
Colour: black
Description: As metamict crystals up to 4 cm long and 2 cm thick with a greybrowh\n, brown, yellow or white crust of varying thickness.
ⓘ Petscheckite var. Hydroxy-petscheckite
Formula: U4+(Fe3+1/3,◻2/3)(Nb,Ta)2O7(O,OH)
ⓘ Petscheckite var. Oxy-petscheckite
Formula: UFe3+2/3◻1/3(Nb,Ta)2O8
Formula: Cs(Be2Li)Al2(Si6O18)
Localities:
Sakavalana mine, Ambatovita, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Tompoambohitra (Tokambohitra), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Description: Found in a large miarolitic cavity containing large crystals of citrine quartz, green amazonite, albite, green-to pink spodumene and multicolored liddicoatite.
Formula: KFe3+4(AsO4)3(OH)4 · 6-7H2O
Formula: Be2SiO4
Localities: Reported from at least 9 localities in this region.
Localities:
Antsiranana (Diego-Suarez) District, Diana, Madagascar
Ambohimahavony, Arivonimamo II, Arivonimamo District, Itasy, Madagascar
Baie des Amis, Antsiranana (Diego-Suarez) District, Diana, Madagascar
Nosy Be, Diana, Madagascar
Formula: KMg3(AlSi3O10)(OH)2
Localities: Reported from at least 205 localities in this region.
Formula: FePO4 · 2H2O
ⓘ Phosphosiderite var. Vilateite
Formula: FePO4 · 2H2O
Habit: very small crystals
Colour: colourless to clar pinkish
Description: Described by Behier (1957,1960) first under the name blue "metastrengite"
Formula: KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
Localities:
Bemasoandro pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Vatovory (Vinaninkarena Uranium deposit), Anjanamanjaka, Vinaninkarena, Antsirabe II District, Vakinankaratra, Madagascar
Marivolanitra pegmatite, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar ? (more information)
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
Localities: Reported from at least 40 localities in this region.
Formula: Pt
Localities:
Ambodibonara Placer, Antanambao-Manampotsy area, Antanambao Manampotsy District, Atsinanana, Madagascar
Ambodivolafotsy, Tratramarina, Anosibe An'ala District, Alaotra-Mangoro, Madagascar
Bemalaha, Vondrozo, Atsimo-Atsinanana, Madagascar
Formula: (Cs,Na)2(Al2Si4O12) · 2H2O
Localities: Reported from at least 8 localities in this region.
Formula: [Ag6Sb2S7][Ag9CuS4]
Description: As inclusions in galena
ⓘ 'Polylithionite-Trilithionite Series'
Localities: Reported from at least 39 localities in this region.
ⓘ Potassic-fluoro-pargasite (TL)
Formula: KCa2(Mg4Al)(Si6Al2)O22F2
Type Locality:
References:
Oberti, R., Boiocchi, M., Hawthorne, F. C., Pagano, R., Pagano, A. (2010) Fluoro-potassic-pargasite, KCa2(Mg4Al)(Si6Al2)O22F2, from the Tranomaro area, Madagascar: mineral description and crystal chemistry. Mineralogical Magazine, 74 (6) 961-967 doi:10.1180/minmag.2010.074.6.961
Formula: Ca2Al2Si3O10(OH)2
Localities: Reported from at least 7 localities in this region.
ⓘ 'Proustite-Pyrargyrite Series'
Formula: Cu5(PO4)2(OH)4
Localities: Reported from at least 17 localities in this region.
Formula: Bi(VO4)
Localities: Reported from at least 9 localities in this region.
Habit: as crust on bismite
Formula: Ca2XAl2[Si2O6(OH)][SiO4](OH)2A
Formula: FeS2
Localities: Reported from at least 54 localities in this region.
Formula: A2Nb2(O,OH)6Z
Localities: Reported from at least 14 localities in this region.
Description: first-generation, homogeneous = > uranoan pyrochlore
ⓘ 'Pyrochlore Group var. Plumbopyrochlore (of Skorobogatova et al.)'
Formula: A2Nb2(O,OH)6Z
ⓘ 'Pyrochlore Group var. Samiresite'
Formula: (U,Ca,Ce,Pb)2(Nb,Ta)2O6(OH,F)
Localities:
Samiresy, Tritriva, Betafo District, Vakinankaratra, Madagascar
Vorondolo massif, Tsarazaza, Fandriana, Amoron'i Mania, Madagascar
Fefena pegmatite, Betafo District, Vakinankaratra, Madagascar
ⓘ 'Pyrochlore Group var. Uranpyrochlore (of Hogarth 1977)'
Formula: (Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
Localities: Reported from at least 6 localities in this region.
ⓘ 'Pyrochlore Group var. Yttropyrochlore (of Hogarth 1977)'
Formula: A2Nb2(O,OH)6Z
Formula: A2-mD2X6-wZ1-n
Localities: Reported from at least 58 localities in this region.
ⓘ 'Pyrochlore Supergroup var. Betafite (of Hogarth 1977)' (FRL)
Formula: (Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH)
Localities: Reported from at least 43 localities in this region.
Habit: masses ; octaedres
Formula: Mn4+O2
Localities:
Ampanihy rhodonite deposits, Ampanihy District, Atsimo-Andrefana, Madagascar
Ambalafolo, Vangaindrano, Atsimo-Atsinanana, Madagascar
Ambindavato, Soamanonga, Betioky District, Atsimo-Andrefana, Madagascar
Masokoamena, Sarobaratra Commune, Tsaratanàna District, Betsiboka, Madagascar
Sarobaratra, Ambatomiady, Antanifotsy District, Vakinankaratra, Madagascar
Formula: Pb5(PO4)3Cl
Localities: Reported from at least 9 localities in this region.
Formula: Mg3Al2(SiO4)3
Localities:
Ambahatany, Color-changing Garnet Mining Field, Ambahita, Bekily District, Androy, Madagascar
Green Giant Vanadium Property, Atsimo-Andrefana, Madagascar
Beseva malaya garnets mining area, Ampanihy Ouest, Ampanihy District, Atsimo-Andrefana, Madagascar
Soamiakatra, Ambohitsimanova, Antsirabe II District, Vakinankaratra, Madagascar
Localities:
Color-changing garnet occurrence, Tranoroa, Beloha District, Androy, Madagascar
Ambahatany, Color-changing Garnet Mining Field, Ambahita, Bekily District, Androy, Madagascar
Bekily District, Androy, Madagascar
Colour: Brownish-purple-red
Description: Brownish-purple-red in daylight or fluorescent light, purplish red in incandescent light
ⓘ 'Pyrope-Spessartine Series var. Umbalite'
Formula: Mg3Al2(SiO4)3 - Mn3Al2(SiO4)3
Localities:
Color-changing garnet occurrence, Tranoroa, Beloha District, Androy, Madagascar
Beseva malaya garnets mining area, Ampanihy Ouest, Ampanihy District, Atsimo-Andrefana, Madagascar
Bekily District, Androy, Madagascar
Formula: Al2Si4O10(OH)2
Formula: ADSi2O6
Localities: Reported from at least 19 localities in this region.
ⓘ 'Pyroxene Group var. Al-pyroxene'
References:
Giuliani, Gaston, Groat, Lee, Fallick, Anthony, Pignatelli, Isabella, Pardieu, Vincent (2020) Ruby Deposits: A Review and Geological Classification. Minerals, 10 (7) 597 doi:10.3390/min10070597
Formula: Fe1-xS
Localities: Reported from at least 13 localities in this region.
Description: Specimen in the Geologisches und Mineralogisches Museum. Institut für Geowissenschaften der CAU Kiel, inventory nr. 5369. See http://www.museen-sh.de/ml/digi\_einzBild.php?pi=145\_5369
Formula: SiO2
Localities: Reported from at least 372 localities in this region.
Formula: SiO2
Localities: Reported from at least 48 localities in this region.
Formula: SiO2
Localities: Reported from at least 31 localities in this region.
Formula: SiO2
Localities: Reported from at least 9 localities in this region.
ⓘ Quartz var. Ferruginous Quartz
Formula: SiO2
Formula: SiO2
Formula: SiO2
ⓘ Quartz var. Pseudocubic Quartz
Formula: SiO2
Formula: SiO2
Localities: Reported from at least 8 localities in this region.
Formula: SiO2
Localities: Reported from at least 38 localities in this region.
ⓘ Quartz var. Rutilated Quartz
Formula: SiO2
Description: Known locally as "cheveux de Venus" (hair of Venus)
Formula: SiO2
Localities:
Ambatomanoina, Ambatomanoina Commune, Anjozorobe District, Analamanga, Madagascar
Lake Alaotra, Alaotra-Mangoro, Madagascar
Andilamena Quartz Quarries, Andranotokana Massif, Andilamena District, Alaotra-Mangoro, Madagascar
Vakinankaratra, Madagascar
Andilamena District, Alaotra-Mangoro, Madagascar
Formula: SiO2
Localities: Reported from at least 53 localities in this region.
Formula: Nd(PO4) · H2O
Formula: (K,Cs)Al4Be4(B,Be)12O28
Localities: Reported from at least 16 localities in this region.
Habit: Up to 2 cm large well developed dodecahedral crystals modified by tetrahedron {111} faces
Colour: Pale to honey yellow; colorless. Transparent to translucent
Description: Occurs in saccharoidal albite close to the contact with the hosting marble, and in miarolitic cavities.
Formula: MnCO3
Description: Anhedral grains of pink lithiophilite may locally been replaced by rhodochrosite.
References:
Novák, Milan, Cempírek, Jan, Gadas, Petr, Škoda, Radek, Vašinová Galiová, Michaela, Pezzotta, Federico, Groat, Lee A. (2015) Boralsilite and Li, Be-bearing "Boron Mullite" Al8B2Si2O19, Breakdown products of spodumene from the Manjaka pegmatite, Sahatany valley, Madagascar. The Canadian Mineralogist, 53 (2) 357-374 doi:10.3749/canmin.1400092
Formula: CaMn3Mn[Si5O15]
Localities:
Ampanihy rhodonite deposits, Ampanihy District, Atsimo-Andrefana, Madagascar
Ambindavato, Soamanonga, Betioky District, Atsimo-Andrefana, Madagascar
Lazarivo deposit, Lazarivo, Betioky District, Atsimo-Andrefana, Madagascar
Begorago rhodonite deposit, Maniry, Ampanihy District, Atsimo-Andrefana, Madagascar
Formula: Na(NaCa)Mg5(Si8O22)(OH)2
Formula: ◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Localities: Reported from at least 6 localities in this region.
Formula: (Ca3Ce)Na(NaCa)Ti(Si2O7)2(OF)F2
Formula: Fe2+Fe3+4(PO4)3(OH)5
Localities:
Marivolanitra pegmatite, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Bemasoandro pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Ambatoharanana pegmatite (Androfia), Manakana Commune, Tsaratanàna District, Betsiboka, Madagascar
Habit: botryoidal masses or as fibrous crust up to one cm.
Formula: (Cu,Zn)2(CO3)(OH)2
Habit: Ddistinct crystals formingg smal rosette-like aggregates, crust concisting og spherelike aggregates
Colour: Pale blue, pale bluishgreen
Formula: K(V3+,Al)2(AlSi3O10)(OH)2
Formula: Na6Ca6Zr3Ti(Si2O7)4O2F6
Formula: ◻(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH)
Formula: (Fe3+,Ta)(Nb,Ti)O4
References:
Lykova, Inna, Rowe, Ralph, Poirier, Glenn, McDonald, Andrew M., Giester, Gerald (2021) Nioboheftetjernite, ScNbO4, a new mineral from the Befanamo Pegmatite, Madagascar. The Canadian Mineralogist, 59 (2) 445-452 doi:10.3749/canmin.2000070
Formula: TiO2
Localities: Reported from at least 66 localities in this region.
Description: Rutilated crystals as inclusions in quartz ( "cheveux de Venus" (Hair of Venus))
Formula: (Ti,Nb)O2
Localities: Reported from at least 18 localities in this region.
Habit: masses of several kilos, crystals are rare (A.Lacroix)
ⓘ Rutile var. Niobium-bearing Rutile
Formula: (Ti,Nb)O2
Description: Found in small bands at the exocontact of the pegmatite with the host rock.
References:
Formula: (Ti,Ta,Fe)O2
Localities: Reported from at least 11 localities in this region.
Formula: CaTa2O6
Localities:
Ampanodiana South pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar
Ampanodiana North pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar
Tetezantsio pegmatites, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar
Habit: prismatic
Colour: dark gray
Description: As alteration of behierite-schiavinatoite crystals. Identification has been confirmed by single-crystal X-ray diffraction by RRUFF. (RRUFF ID: R080064.2)
Formula: YFe3+Nb2O8
Localities: Reported from at least 29 localities in this region.
Formula: K(AlSi3O8)
Localities: Reported from at least 11 localities in this region.
Habit: Prismatic
Colour: Yellow
Description: All the gemmy yellow "Orthoclase" is Sanidine
Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Description: pseudomorph after olivine
Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Description: pseudomorph after olivine
Formula: Mg4(Mg3Al9)O4[Si3Al9O36]
Localities: Reported from at least 25 localities in this region.
Localities: Reported from at least 67 localities in this region.
Colour: Pale yellow
Localities: Reported from at least 27 localities in this region.
Formula: Ca(WO4)
Localities: Reported from at least 6 localities in this region.
ⓘ Scheelite var. Molybdoscheelite
Formula: Ca(WO4)
Formula: (Nb,Ta)(BO4)
Localities:
Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar
Ampanodiana South pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar
Ampanodiana North pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar
Habit: as cryptocrystalline portions in behierite
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Localities: Reported from at least 49 localities in this region.
Formula: V3+2Ti4+3O9
Description: As intergrowths within rutile
Formula: CaAl2Si3O10 · 3H2O
Localities:
Sakenite outcrops, Mahasoa, Ihosy District, Ihorombe, Madagascar
Antsiranana (Diego-Suarez) District, Diana, Madagascar
Antetezantany, Morarano Chrome Commune, Amparafaravola District, Alaotra-Mangoro, Madagascar
Square Clémenceau, Antsiranana (Diego-Suarez) District, Diana, Madagascar
Formula: Fe3+AsO4 · 2H2O
Formula: Mg4(Si6O15)(OH)2 · 6H2O
Localities:
Ampandrandava phlogopite mine, Beraketa, Bekily District, Androy, Madagascar
Ambondrombe, Beraketa, Bekily District, Androy, Madagascar
Mikoboka phlogopite deposit, Belindo Mahasoa, Bekily District, Androy, Madagascar
Mafilefy phlogopite mine, Ampamata, Ambovombe-Androy, Androy, Madagascar
Formula: Ca4[Mg6Al6]O4[Si6B3Al3O36]
Localities:
Ianapera emerald deposit (Sakalava), Ianapera, Benenitra District, Atsimo-Andrefana, Madagascar
Vohimena hill, Sahambano, Ihosy District, Ihorombe, Madagascar
Vohibola phlogopite deposit, Behara, Amboasary Sud District, Anosy, Madagascar
Amboahangy, Amboasary Sud District, Anosy, Madagascar
Colour: Prussian blue
Description: in a calc-silicate rock associated with clintonite clinopyroxenites
Formula: D3[Si2O5](OH)4
Localities: Reported from at least 12 localities in this region.
Formula: FeCO3
Formula: Al2(SiO4)O
Localities: Reported from at least 29 localities in this region.
Formula: Ag
Localities:
Besakay Mines, Betrandraka Commune, Tsaratanàna District, Betsiboka, Madagascar
Betakilotra (Betankilotra), Betsiaka Commune, Ambilobe, Diana, Madagascar
Rafiatokana gold prospect, Ankavandra, Miandrivazo, Menabe, Madagascar
Formula: (Ca,Na)4(Al6Si6O24)(SO4,CO3)
Formula: MgAl(BO4)
Formula: CoAs3
Formula: ZnCO3
Formula: Na4(Si3Al3)O12Cl
Formula: PtAs2
References:
McDonald, I., Ohnenstetter, D., Ohnenstetter, M., Vaughan, D. J. (1999) Palladium oxides in ultramafic complexes near Lavatrafo, Western Andriamena, Madagascar. Mineralogical Magazine, 63 (3) 345-352 doi:10.1180/002646199548565
Formula: Mn2+3Al2(SiO4)3
Localities: Reported from at least 51 localities in this region.
Formula: Mn2+3Al2(SiO4)3
Formula: ZnS
Localities: Reported from at least 12 localities in this region.
Formula: MgAl2O4
Localities: Reported from at least 115 localities in this region.
Formula: (Mg,Fe)Al2O4
Localities:
Andranomadio, Faratsiho, Vakinankaratra, Madagascar
Nosy Mitsio, Antsohimbondrona Commune, Ambilobe, Diana, Madagascar
Antanifotsy District, Vakinankaratra, Madagascar
Betafo District, Vakinankaratra, Madagascar
Formula: (Mg,Fe)Al2O4
Localities:
Antsiriky, Tuléar Province (Toliara), Madagascar
Antohidrano, Antetezambaro, Toamasina II District, Atsinanana, Madagascar
Amboasary Sud District, Anosy, Madagascar
Betroka District, Anosy, Madagascar
Formula: A2+D3+2O4
Formula: LiAlSi2O6
Localities: Reported from at least 20 localities in this region.
Colour: pink, colorless, pink
Formula: LiAlSi2O6
Localities:
Sakavalana mine, Ambatovita, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Tsarafara Sud (Ankadilava), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Formula: LiAlSi2O6
Localities:
Sakavalana mine, Ambatovita, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Ampatsikahitra pegmatites, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Ambatonivarina, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Anjanabonoina pegmatites, Ambohimanambola, Betafo District, Vakinankaratra, Madagascar
Maharitra, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Formula: Fe2+2Al9Si4O23(OH)
Localities:
Ampandramaika pegmatite, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Antananolofotsy, Andrembesoa, Betafo District, Vakinankaratra, Madagascar
Soanierana-Ivongo, Analanjirofo, Madagascar
Malakialina area, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Formula: Ca4(Si28Al8)O72 · 28H2O
Formula: Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
Formula: Sb(Ta,Nb)O4
Localities:
Ampanodiana South pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar
Ampanodiana North pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar
Antandrokomby pegmatite, Manandona Valley, Sahatsiho Ambohimanjaka, Ambositra, Amoron'i Mania, Madagascar
Description: As alteration of behierite-schiavinatoite crystals
Formula: Sb2S3
Formula: NaCa4(Si27Al9)O72 · 28H2O
Formula: M6-7[Al8-9Si27-28O72] · nH2O
Localities: Reported from at least 11 localities in this region.
Formula: Pd8As3
References:
Formula: FePO4 · 2H2O
Formula: S8
Localities:
Antsolifara, Vinaninkarena, Antsirabe II District, Vakinankaratra, Madagascar
Maevatanana District, Betsiboka, Madagascar
Morafenobe District, Melaky, Madagascar
Kianjasoa, Mahasolo Commune, Tsiroanomandidy District, Bongolava, Madagascar
Formula: SrAl3(PO4)(SO4)(OH)6
Formula: CaCe(CO3)2F
Localities:
Rare Earth prospect, Unnamed caldera, Betaimboay, Antsirabe, Ambanja, Diana, Madagascar
Ampasibitika, Antsirabe, Ambanja, Diana, Madagascar
Ambohimirahavavy Alkaline Complex, Antsirabe, Ambanja, Diana, Madagascar
Formula: CaY(CO3)2F
Formula: Mg3Si4O10(OH)2
Localities: Reported from at least 16 localities in this region.
Formula: Mg3(Si4O10)(OH)2
Formula: (Mn,Fe)(Ta,Nb)2O6
Localities: Reported from at least 7 localities in this region.
Description: Probably Tantalite-(Mn) ?
Formula: Fe2+Ta2O6
Description: Specimen in the Muséum national d' Histoire Naturelle, Paris. (MNHN No 193.14). Excact locality not known
Formula: Mn2+Ta2O6
Localities:
Adaboroa pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar
Malakialina pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Ilontsa (Ilotsa), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Antsahanana quarry, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Formula: (Fe,Mn)(Ta,Nb)2O6
Formula: Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2
Description: There is no published analytical data supporting the identification of taramite in these rocks
Formula: LiFe3+(PO4)(OH)
Formula: Y2(CO3)3 · 2-3H2O
Description: Showed to be churchite (Behier 1960b)
Formula: Mn2+2SiO4
Formula: Cu6(Cu4C2+2)Sb4S12S
Formula: Na2CO3 · H2O
Formula: ThO2
Localities: Reported from at least 63 localities in this region.
Habit: cubes
Description: Unusually large crystals (Up to several centimeters!).
ⓘ Thorianite var. Uranothorianite
Formula: (Th,U)O2
Localities: Reported from at least 6 localities in this region.
Formula: Th(SiO4)
Localities: Reported from at least 29 localities in this region.
Description: The variety "uranothorite" occurs here
Formula: (Th,Fe3+)[Si(O,OH)4]
Formula: Th(SiO4)
Localities: Reported from at least 14 localities in this region.
Formula: (Th,U)(SiO4)1-x(OH)4x
Localities: Reported from at least 9 localities in this region.
Formula: (Th,U)SiO4
Localities:
Fiadanana pegmatite, Amparaky, Soavinandriana District, Itasy, Madagascar
Ambatofotsy pegmatite, Mahavelona, Soavinandriana District, Itasy, Madagascar
Ambohijatovo, Masindray, Soavinandriana District, Itasy, Madagascar
Formula: Sc2Si2O7
Localities: Reported from at least 6 localities in this region.
Description: Described as the variety befanamite
ⓘ Thortveitite var. Befanamite (FRL)
Formula: Sc2Si2O7
Localities:
Befanamo pegmatite, Beronono, Anjozorobe District, Analamanga, Madagascar
Bemoka pegmatite, Bekapaika Commune, Tsaratanàna District, Betsiboka, Madagascar
Unnamed Pegmatite, Kelimaizina, Andranomamy, Ambato-Boeni, Boeny, Madagascar ? (more information)
Description: The largest crystal found weighed 450 gram. Found as groups of parallellgrowing crystals mostly embedded in quartz, but it has been observed together with strüverite, monazite and beryl. Small crystals of green thortveitite has been observed on monazite crystals.
Formula: CaTi(SiO4)O
Localities: Reported from at least 69 localities in this region.
Formula: CaTi(SiO4)O
Formula: Al2(SiO4)(F,OH)2
Localities: Reported from at least 30 localities in this region.
Formula: Cu(UO2)2(PO4)2 · 12H2O
Formula: LiAl4Be4(B11Be)O28
Type Locality:
References:
Formula: A D3G6 (T6O18)(BO3)3X3Z
Localities: Reported from at least 168 localities in this region.
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Localities: Reported from at least 28 localities in this region.
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Localities:
Tsarafara Sud (Ankadilava), Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Ambarivondra, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
ⓘ 'Tourmaline var. Watermelon Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Formula: ◻Ca2Mg5(Si8O22)(OH)2
Localities: Reported from at least 21 localities in this region.
Formula: SiO2
Description: Found in a "biotite-trachyte", partly or nearly completely paramorphed to quartz
Formula: K(Li1.5Al1.5)(AlSi3O10)(F,OH)2
References:
**Vandall King**Identified by Vandall Thomas King: Dealer/Collection Label
Formula: LiFe2+PO4
Formula: Mn2+2(PO4)F
Localities:
Bemasoandro pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Marivolanitra pegmatite, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Ampandramaika pegmatite, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Ambatoharanana pegmatite (Androfia), Manakana Commune, Tsaratanàna District, Betsiboka, Madagascar
Bemokoto pegmatite (Bemakoto), Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Formula: Al4(PO4)3(OH)3
Localities:
Tsiambenana Quarry, Itremo, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Col d'Itremo, Itremo, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Analambano, Ibity massif, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Habit: small grains
Description: Found in the grain boundary between goyazite and lazulite
Formula: ◻(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2
Formula: WO3 · H2O
Formula: (K,◻)(Ca,Na)2ThSi8O20 · nH2O
Formula: CuAl6(PO4)4(OH)8 · 4H2O
Formula: (Pd,Pt,Au)2Cu
Formula: Pt3(Cu,Fe)
Formula: (Ir,Pt)O2
Formula: (Pt,Cu,Pd,Rh,Os)3S2
Formula: (Pd,Pt)3(Cu,Ni)S2
Formula: (Pd,Pt)2RhCuS4
Formula: Pd4S
Formula: (Pd,Pt)2S
Formula: (Fe2+,Mg)2Al14Si4B4O37
References:
Formula: PdO · 3H2O
References:
McDonald, I., Ohnenstetter, D., Ohnenstetter, M., Vaughan, D. J. (1999) Palladium oxides in ultramafic complexes near Lavatrafo, Western Andriamena, Madagascar. Mineralogical Magazine, 63 (3) 345-352 doi:10.1180/002646199548565
Formula: Pd(OH)2 or Pd(OH)2 · nH2O
ⓘ 'Unnamed (Pd Antimonide Arsenide)'
Formula: Pd3(Sb,As)
References:
McDonald, I., Ohnenstetter, D., Ohnenstetter, M., Vaughan, D. J. (1999) Palladium oxides in ultramafic complexes near Lavatrafo, Western Andriamena, Madagascar. Mineralogical Magazine, 63 (3) 345-352 doi:10.1180/002646199548565
Formula: Ti2V4+2V3+2O11
Formula: UO2
Localities:
Malakialina pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Bemasoandro pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Ambodibonara pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Befarafara, Maromokotra Commune, Vohémar District, Sava, Madagascar
ⓘ 'Uranmicrolite (of Hogarth 1977)'
Formula: (Ca,U,Na)2-x(Ta,Nb)2(O,OH)7
Description: Spelled as uranomikrolith in Pezzotta (1999)
Formula: Ba(UO2)2(PO4)2 · 10H2O
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Localities:
Ambodibonara pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Marivolanitra pegmatite, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Bemasoandro pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Malakialina pegmatite, Fitampito, Ikalamavony District, Haute Matsiatra, Madagascar
Description: Listed as "uranotile-alpha" by Behier (1963)
Formula: CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)
References:
Gadas, P., Novák, M., Vašinová Galiová, M., Pezzotta, F. (2023) Chemical composition of tourmalines from the Manjaka pegmatite and its exocontact, Sahatany Valley, Madagascar. Journal of Geosciences, 68 (3) 185-202 doi:10.3190/jgeosci.374
Formula: (Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Localities: Reported from at least 28 localities in this region.
Formula: Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Localities: Reported from at least 9 localities in this region.
Colour: brownish-red
Description: Crystals to 50 mm long (Behier 1960, Arligue M. specimen is larger)
Formula: (Ca,Ce)(Nb,Ta,Ti)2O6
Description: As alteration of behierite-schiavinatoite crystals
Formula: Pd3As
Formula: Fe2+Fe2+2(PO4)2 · 8H2O
Localities:
Marivolanitra pegmatite, Mandrosonoro, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Antsirabe I District, Vakinankaratra, Madagascar
Sarobaratra, Ambatomiady, Antanifotsy District, Vakinankaratra, Madagascar
Antsirabe II District, Vakinankaratra, Madagascar
Habit: fibrous or botryoidal masses consisting of small sphaerolites or as small tabular crystals in cavities in graftonite
Colour: grey-bluish to blue-lavendel
Description: Behier (1957, 1960) describes the mineral under the name "angelardite" and "metastrengite". It occured in 2 different habitus at Marivolanitra. This one was very similar to the classic angelardite from Limouns, and therefore labelled by him as angelardite. see also under entry vilateite
Formula: Al16B4Si4O38
Type Locality:
Habit: As aggregates of subparallel prisms up to 100 μm long.
Description: Occurs as a breakdown product of spodumene.
References:
Cempírek, Jan, Grew, Edward S., Kampf, Anthony R., Ma, Chi, Novák, Milan, Gadas, Petr, Škoda, Radek, Vašinová-Galiová, Michaela, Pezzotta, Federico, Groat, Lee A., Krivovichev, Sergey V. (2016) Vránaite, ideally Al16B4Si4O38, a new mineral related to boralsilite, Al16B6Si2O37, from the Manjaka pegmatite, Sahatany Valley, Madagascar. American Mineralogist, 101 (9) 2108-2117 doi:10.2138/am-2016-5686
ⓘ 'Wad var. Cobalt-bearing Wad'
Formula: Al3(PO4)2(OH,F)3 · 5H2O
Formula: (Mg,Fe)2Al14Si4B4O37
Colour: Shows yellow pleochroism
Description: Be-werdingite, replaces sillimanite. Found as inclusions in grandidierite or garnet, or as grains 0,05-5mm long and 0,1-2 mm across or as 0,1-2 mm graisn replacing sillimanite.
References:
Localities: Reported from at least 6 localities in this region.
Formula: Ca3(Si3O9)
Localities: Reported from at least 18 localities in this region.
Formula: Pb(MoO4)
Localities:
Besakay Mines, Betrandraka Commune, Tsaratanàna District, Betsiboka, Madagascar
Andavakoera Gold mines, Betsiaka Commune, Ambilobe, Diana, Madagascar
Berezika, Betsiaka Commune, Ambilobe, Diana, Madagascar
Formula: Y(PO4)
Localities: Reported from at least 33 localities in this region.
Formula: LiNaZrSi6O15
Localities:
Anjanabonoina pegmatites, Ambohimanambola, Betafo District, Vakinankaratra, Madagascar
Ankarinarivo pegmatite, Sahatany Valley, Ibity, Antsirabe II District, Vakinankaratra, Madagascar
Ambalalehifotsy pegmatite, Fenoarivo, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar
Ambatomena pegmatite, Col des Tapias, Ilaka Centre, Ambositra, Amoron'i Mania, Madagascar
Formula: Zr(SiO4)
Localities: Reported from at least 118 localities in this region.
Colour: Brownish to deep red
Description: Gemmy.
Formula: Zr[(SiO4),(OH)4]
Description: Cyrtolite mentioned as a associated mineral to "blomstrandite" in Lacroix (1912), but described as malacon later in Lacroix 1922
Formula: (Zr,Hf)SiO4
Formula: Zr(SiO4)
Localities: Reported from at least 30 localities in this region.
Formula: CaZrTi2O7
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Formula: {Ca2}{Al,Mn3+3}(Si2O7)(SiO4)O(OH)