La Cena del Depósito concession, Cerro Minado Mines, Cuesta Alta, Huércal-Overa, Almería, Andalusia, Spain (original) (raw)

Formula: Ag2S

Habit: microscopic grains on schachnerite

References:

VIÑALS, J., FAVREAU, G., and EYTIER C. & J.-R. (2010): Bobkingite, capgaronnite, juanitaite, gerhardtite, reevesite and other rare minerals from Cerro Minado, Huercal-Overa (Almería). Mineral Up, 4, 3, 6-23 Versions simultaneously published in Catalan (Mineralogistes de Catalunya)

ⓘ Adamite

Formula: Zn2(AsO4)(OH)

ⓘ Adamite var. Copper-bearing Adamite

Formula: (Zn,Cu)2AsO4OH

Habit: chisel-shaped prisms, balls

Colour: pale green

Description: Cobalt-bearing varieties are mentioned (Gröbner et al., 2009).

References:

VIÑALS, J., CALVO, M., and MARTÍ, J. (2004): Parnauita, paratacamita y otros minerales secundarios de Cerro Minado, Almería. Revista de Minerales, 2, 5, 47-49.(in Spanish). Versions simultaneously published in Catalan (Mineralogistes de Catalunya) and in English version (Mineral Up)

ⓘ Ankerite

Formula: Ca(Fe2+,Mg)(CO3)2

ⓘ Annabergite

Formula: Ni3(AsO4)2 · 8H2O

Habit: classical flat crystals

Colour: green

✪ Aragonite

Formula: CaCO3

Habit: thick prisms with very distinct end faces

Colour: colorless

ⓘ Arseniosiderite

Formula: Ca2Fe3+3(AsO4)3O2 · 3H2O

ⓘ Asbolane

Formula: (Ni,Co)2-xMn4+(O,OH)4 · nH2O

ⓘ Atacamite

Formula: Cu2(OH)3Cl

Habit: chisel-shaped prisms, platy crystals, short prisms

Colour: green, dark green, bluish

References:

ⓘ Auriacusite

Formula: Fe3+Cu2+(AsO4)O

ⓘ Aurichalcite

Formula: (Zn,Cu)5(CO3)2(OH)6

Habit: pearly scales

Colour: pale green

References:

ⓘ Azurite

Formula: Cu3(CO3)2(OH)2

Habit: small platy crystals sometimes in rosettes, also flat elongated prisms

References:

ⓘ Baryte

Formula: BaSO4

Description: Intermediate phases between baryte and celestine.

ⓘ Belloite

Formula: Cu(OH)Cl

Habit: grains

Colour: yellowish green

Description: Not stable, converts quickly into green earthy copper chlorides.

✪ Bobkingite

Formula: Cu5Cl2(OH)8 · 2H2O

Habit: elongated prisms, rounded masses

Colour: bright blue

Description: Probably the best crystals for the species (07/2010). Contains nickel.

References:

ⓘ Bornite

Formula: Cu5FeS4

ⓘ Brochantite

Formula: Cu4(SO4)(OH)6

Habit: platy crystals, felted fibers

Colour: dark green, pale green

References:

ⓘ Calcite

Formula: CaCO3

Habit: balls, saddle-shaped rhombohedrons

Colour: white, pale pink

ⓘ Calomel

Formula: [Hg2]2+Cl2

Habit: crusts, grains

Colour: brownish, gray

Description: SEM/EDS analysis by Bertrand Devouard - Laboratoire Magmas et Volcans - Observatoire de Physique du Globe de Clermont-Ferrand

References:

✪ Capgaronnite

Formula: AgHgClS

Habit: sharp needles

Colour: yellow

Description: Currently (07/2010) probably the richest specimens known (2 only). SEM/EDS: Bertrand Devouard - Laboratoire Magmas et Volcans - Observatoire de Physique du Globe de Clermont-Ferrand XRD: Tony Kampf - Museum of Natural History of Los Angeles County

References:

ⓘ Carrollite

Formula: CuCo2S4

ⓘ Chalcocite

Formula: Cu2S

ⓘ Chalcopyrite

Formula: CuFeS2

Habit: massive, grains

ⓘ Chenevixite

Formula: Cu2Fe3+2(AsO4)2(OH)4

Habit: masses

Colour: yellowish green

References:

ⓘ Chlorargyrite

Formula: AgCl

Habit: tiny rounded octahedrons

Colour: greenish yellow

Description: SEM/EDS: Bertrand Devouard - Laboratoire Magmas et Volcans - Observatoire de Physique du Globe de Clermont-Ferrand

References:

ⓘ Chrysocolla

Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1

Habit: needles (probalby after olivenite), balls, crusts, veins

Colour: pale blue

ⓘ Cinnabar

Formula: HgS

ⓘ Clinoatacamite

Formula: Cu2(OH)3Cl

Habit: pseudomorphs after azurite

Colour: green

Description: Previously (and erroneously) reported as paratacamite.

References:

ⓘ Clinoclase

Formula: Cu3(AsO4)(OH)3

Description: Miguel Calvo specimen

ⓘ 'Cobalt-bearing Calcite-Spherocobaltite'

ⓘ Cobaltite

Formula: CoAsS

ⓘ Conichalcite

Formula: CaCu(AsO4)(OH)

Habit: crusts, balls with erythrite, calcite

Colour: yellowish green, green

ⓘ Connellite

Formula: Cu19(SO4)(OH)32Cl4 · 3H2O

Habit: fibers, thick needles, coatings

References:

ⓘ Copper

Formula: Cu

Habit: grains in cuprite

ⓘ Cornwallite

Formula: Cu5(AsO4)2(OH)4

ⓘ Covellite

Formula: CuS

Habit: coatings

Colour: blue

ⓘ Cuprite

Formula: Cu2O

Habit: cubes, masses, veins

Colour: dark red

References:

ⓘ 'Cuproroméite' ?

Formula: Cu2Sb2(O,OH)7

ⓘ Digenite ?

Formula: Cu9S5

Description: The mineral was mentioned by Arana (1972), but not found again.

ⓘ Dolomite

Formula: CaMg(CO3)2

ⓘ Eglestonite

Formula: [Hg2]2+3OCl3(OH)

✪ Erythrite

Formula: Co3(AsO4)2 · 8H2O

Habit: rosettes of flat crystals

Colour: pale pink, reddish pink, purplish

Description: Color change may indicate presence of Mg or Ni.

ⓘ Galena

Formula: PbS

✪ Gerhardtite

Formula: Cu2(NO3)(OH)3

Habit: short crystals with beveled faces (wulfenite-like), grains with good cleavage

Colour: dark blue

References:

ⓘ Gersdorffite

Formula: NiAsS

ⓘ Glaukosphaerite

Formula: (Cu,Ni)2(CO3)(OH)2

Habit: small balls

Colour: yellowish green

References:

ⓘ Goethite ?

Formula: α-Fe3+O(OH)

Description: The mineral was mentioned by Arana (1972), but not found again.

ⓘ Gold

Formula: Au

ⓘ Hematite ?

Formula: Fe2O3

Description: The mineral was mentioned by Arana (1972), but not found again.

ⓘ Heterogenite

Formula: Co3+O(OH)

Description: Joachim Gröbner specimen and analysis

ⓘ Hörnesite

Formula: Mg3(AsO4)2 · 8H2O

ⓘ Iodargyrite

Formula: AgI

ⓘ Jarosite

Formula: KFe3+3(SO4)2(OH)6

Habit: flat pseudohexagonal crystals, powdery masses

Colour: brown

ⓘ Juanitaite

Formula: (Cu,Ca,Fe)10Bi(AsO4)4(OH)11 · 2H2O

Habit: tiny scales

Colour: yellowish green, metallic lustre

Description: Can be visually confused with reevesite. 2nd world locality

References:

ⓘ Lavendulan

Formula: NaCaCu5(AsO4)4Cl · 5H2O

ⓘ Luanheite

Formula: Ag3Hg

Habit: irregular masses

Description: Associated with chenevixite. SEM/EDS: Bertrand Devouard - Laboratoire Magmas et Volcans - Observatoire de Physique du Globe de Clermont-Ferrand

References:

ⓘ Magnetite ?

Formula: Fe2+Fe3+2O4

Description: The mineral was mentioned by Arana (1972), but not found again.

ⓘ Malachite

Formula: Cu2(CO3)(OH)2

Habit: needles, crusts, balls, pseudo-rhombohedral crystals, tree-like

Description: Tree-like forms may derive from copper/cuprite.

ⓘ Mercury

Formula: Hg

Habit: droplets in cuprite/malachite

Colour: steel gray

References:

ⓘ Millerite ?

Formula: NiS

ⓘ Mixite

Formula: BiCu6(AsO4)3(OH)6 · 3H2O

References:

ⓘ Muscovite

Formula: KAl2(AlSi3O10)(OH)2

ⓘ Nantokite

Formula: CuCl

Habit: grains; rare small distorted crystals

Colour: colorless, white, yellowish

Description: Not stable, converts quickly into green earthy copper chlorides.

References:

ⓘ Olivenite

Formula: Cu2(AsO4)(OH)

Habit: needles

Colour: white, pale brown, purplish brown, green

References:

✪ Olivenite var. Cobalt-bearing Olivenite

Formula: (Cu,Co)2AsO4(OH)

Habit: chisel-shaped prisms, balls

Colour: purplish, brown

ⓘ Paraschachnerite

Formula: Ag3Hg2

ⓘ ~~Paratacamite~~

Formula: Cu3(Cu,Zn)(OH)6Cl2

Description: Is in fact clinoatacamite (Viñals et al., 2010).

References:

ⓘ Parnauite

Formula: Cu9(AsO4)2(SO4)(OH)10 · 7H2O

Habit: fuzzy aggregates

Colour: pale blue

Description: Often found to contain nickel (Viñals et al., 2010).

References:

ⓘ Pitticite ?

Formula: (Fe, AsO4, H2O) (?)

ⓘ Proustite ?

Formula: Ag3AsS3

Description: The mineral was mentioned by Arana (1972), but not found again.

ⓘ Pyrargyrite ?

Formula: Ag3SbS3

Description: The mineral was mentioned by Arana (1972), but not found again.

ⓘ Pyrite

Formula: FeS2

ⓘ Quartz

Formula: SiO2

✪ Reevesite

Formula: Ni6Fe3+2(OH)16(CO3) · 4H2O

Habit: hexagonal platy crystals, scales

Colour: yellow, brownish yellow

References:

ⓘ Rosasite

Formula: (Cu,Zn)2(CO3)(OH)2

ⓘ Rouaite

Formula: Cu2(NO3)(OH)3

ⓘ Rutile

Formula: TiO2

ⓘ Schachnerite

Formula: Ag1.1Hg0.9

Habit: grains, coatings in cuprite, also tree-like irregular structures

Colour: silver gray

References:

ⓘ Scorodite

Formula: Fe3+AsO4 · 2H2O

Formula: FeCO3

Formula: CoNi2S4

Formula: Ag

Formula: ZnCO3

Habit: "rice-grain" rounded crystals

Colour: pink

References:

ⓘ Spherocobaltite

Formula: CoCO3

Habit: crusts; small rounded crystals

Colour: pale pink; reddish pink

Description: Unusual color may be due to high nickel contents (up to 40% of Co+Ni).

References:

ⓘ 'Tennantite Subgroup'

Formula: Cu6(Cu4C2+2)As4S12S

Habit: grains

Colour: black

Description: Tetrahedrite may be present, too. SEM/EDS analysis by Association Jean Wyart, Paris.

ⓘ Tenorite

Formula: CuO

Habit: scales

Colour: black

References:

ⓘ Tiemannite

Formula: HgSe

ⓘ Tyrolite

Formula: Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O

Habit: small grains, platy crystals organized in compact balls, books

Colour: bluish green, blue

References:

ⓘ Zálesíite

Formula: CaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O

ⓘ Zincolivenite

Formula: CuZn(AsO4)(OH)

Habit: pseudo-octahedrons, mixed crystals with adamite

Colour: grayish green to pale purple; grayish to pink

Description: Cannot be told visually from cobalt-bearing adamite.