Mahenge, Morogoro Region, Tanzania (original) (raw)

ⓘ 'Apatite'

Formula: Ca5(PO4)3(Cl/F/OH)

Localities:

Ipanko, Mahenge, Morogoro Region, Tanzania
Ketuti, Mahenge, Morogoro Region, Tanzania
Ruaha, Mahenge, Morogoro Region, Tanzania
Mahenge, Morogoro Region, Tanzania

ⓘ Calcite

Formula: CaCO3

ⓘ 'Chlorite Group'

References:

Wu, Jinlin, Xueying Sun, Hong Ma, Peiying Ning, Na Tang, Ting Ding, Huihuang Li, Tianyang Zhang, and Ying Ma. (2023) "Purple-Violet Gem Spinel from Tanzania and Myanmar: Inclusion, Spectroscopy, Chemistry, and Color" Minerals 13, no. 2: 226. https://doi.org/10.3390/min13020226

ⓘ Clinohumite

Formula: Mg9(SiO4)4F2

ⓘ Corundum

Formula: Al2O3

Localities:

Mahenge, Morogoro Region, Tanzania
Lukanda (Lukande), Mahenge, Morogoro Region, Tanzania
Mayote, Mahenge, Morogoro Region, Tanzania
Chipa, Mahenge, Morogoro Region, Tanzania

ⓘ Corundum var. Ruby

Formula: Al2O3

Localities:

Lukanda (Lukande), Mahenge, Morogoro Region, Tanzania
Mayote, Mahenge, Morogoro Region, Tanzania
Chipa, Mahenge, Morogoro Region, Tanzania
Mahenge, Morogoro Region, Tanzania

ⓘ Corundum var. Sapphire

Formula: Al2O3

ⓘ Diopside

Formula: CaMgSi2O6

ⓘ Dolomite

Formula: CaMg(CO3)2

ⓘ Forsterite

Formula: Mg2SiO4

References:

Wu, Jinlin, Xueying Sun, Hong Ma, Peiying Ning, Na Tang, Ting Ding, Huihuang Li, Tianyang Zhang, and Ying Ma. (2023) "Purple-Violet Gem Spinel from Tanzania and Myanmar: Inclusion, Spectroscopy, Chemistry, and Color" Minerals 13, no. 2: 226. https://doi.org/10.3390/min13020226

ⓘ Graphite

Formula: C

ⓘ 'Högbomite'

Formula: (Mg,Fe)2(Al,Ti)5O10

References:

Wu, Jinlin, Xueying Sun, Hong Ma, Peiying Ning, Na Tang, Ting Ding, Huihuang Li, Tianyang Zhang, and Ying Ma. (2023) "Purple-Violet Gem Spinel from Tanzania and Myanmar: Inclusion, Spectroscopy, Chemistry, and Color" Minerals 13, no. 2: 226. https://doi.org/10.3390/min13020226

ⓘ Magnesite

Formula: MgCO3

ⓘ Magnetite

Formula: Fe2+Fe3+2O4

ⓘ 'Olivine Group'

Formula: M2SiO4

References:

Wu, Jinlin, Xueying Sun, Hong Ma, Peiying Ning, Na Tang, Ting Ding, Huihuang Li, Tianyang Zhang, and Ying Ma. (2023) "Purple-Violet Gem Spinel from Tanzania and Myanmar: Inclusion, Spectroscopy, Chemistry, and Color" Minerals 13, no. 2: 226. https://doi.org/10.3390/min13020226

ⓘ Pargasite

Formula: NaCa2(Mg4Al)(Si6Al2)O22(OH)2

References:

Wu, Jinlin, Xueying Sun, Hong Ma, Peiying Ning, Na Tang, Ting Ding, Huihuang Li, Tianyang Zhang, and Ying Ma. (2023) "Purple-Violet Gem Spinel from Tanzania and Myanmar: Inclusion, Spectroscopy, Chemistry, and Color" Minerals 13, no. 2: 226. https://doi.org/10.3390/min13020226

ⓘ Phlogopite

Formula: KMg3(AlSi3O10)(OH)2

ⓘ Powellite

Formula: Ca(MoO4)

ⓘ Pyrite

Formula: FeS2

References:

Wu, Jinlin, Xueying Sun, Hong Ma, Peiying Ning, Na Tang, Ting Ding, Huihuang Li, Tianyang Zhang, and Ying Ma. (2023) "Purple-Violet Gem Spinel from Tanzania and Myanmar: Inclusion, Spectroscopy, Chemistry, and Color" Minerals 13, no. 2: 226. https://doi.org/10.3390/min13020226

ⓘ Quartz

Formula: SiO2

ⓘ Rutile

Formula: TiO2

ⓘ 'Scapolite'

ⓘ Spinel

Formula: MgAl2O4

Localities: Reported from at least 8 localities in this region.

Colour: purple, pinkish-purple, brownish-purple, and violet

ⓘ Tremolite

Formula: ◻Ca2Mg5(Si8O22)(OH)2