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Andorite : PbAgSb3S6 | |
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Cerro de Potosí (Cerro Rico), Potosí City, Potosí Department, Bolivia 30 x 20 mm specimen. Aggregate of radiating, leaf-like blades of andorite. RFC T1691. |
| © Michael C. Roarke | Photo ID: 99133 View Count: 160 |
Andorite : PbAgSb3S6 | |
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Pailaviri Mine, Cerro de Potosí (Cerro Rico), Potosí City, Potosí Department, Bolivia Width of field is 2.5 mm. Collection of Jesse Crawford. The depth of field has been enhanced using Helicon Focus (5 exposures). Equipment: Nikon D-100 on a homemade microscope. |
| © 2008 Jesse Crawford | Photo ID: 174346 View Count: 80 |
Doyleite : Al(OH)3, Sphalerite : (Zn,Fe2+)S | |
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Cerro de Potosí (Cerro Rico), Potosí City, Potosí Department, Bolivia An 18cm specimen of multicolored Doyleite crusts on massive Sphalerite. Purchased by fellow PhD student, Sam Haines at Cerro Rico as a smithsonite. It was later identified as Doyleite by XRD. Sam cut the specimen in half, and gave me this half, the other remains in his personal collection. C. Stefano specimen #1919. |
| © C. Stefano '09 | Photo ID: 208156 View Count: 117 |
Faustite : (Zn,Cu)Al6[(OH)4|(PO4)2]2 · 4H2O, Siderite : FeCO3, Phosphophyllite : Zn2Fe(PO4)2·4H2O, Quartz : SiO2 | |
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Cerro de Potosí (Cerro Rico), Potosí City, Potosí Department, Bolivia Dark green faustite spherules (paler on the inside) roughly 1mm across, on siderite and druzy quartz with pale-colored massive phosphophyllite (about 4cm) from Cerro Rico. |
| © Alfredo Petrov | Photo ID: 78802 View Count: 334 |
Greenockite : CdS, Arsenopyrite : FeAsS - (Fe0.90Co0.10)AsS | |
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Cerro de Potosí (Cerro Rico), Potosí City, Potosí Department, Bolivia Strange filiform aggregates of micro red greenockite crystals at the base of a crude hexagonal mass of arsenopyrite crystals, which might be a pseudomorph after pyrrhotite. Alfredo Petrov collection; 2.5cm. |
| © alfredo petrov | Photo ID: 81251 View Count: 337 |
Gypsum : Ca[SO4] · 2H2O | |
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Cerro de Potosí (Cerro Rico), Potosí City, Potosí Department, Bolivia Post-mining sulphates on wall of "La Negra" drive. "Rams horn" variety of gypsum. FOV = ~500 mm. Photograph of Rod Martin |
| Photo ID: 237876 View Count: 33 | |
Melanterite : FeSO4·7H2O | |
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Cerro de Potosí (Cerro Rico), Potosí City, Potosí Department, Bolivia Post-mining sulphates on roof of "La Negra" drive. FOV = ~270 mm. Photograph of Rod Martin |
| Photo ID: 237874 View Count: 58 | |
Miargyrite : AgSbS2 | |
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Cerro de Potosí (Cerro Rico), Potosí City, Potosí Department, Bolivia Granular mass of subhedral miargyrite crystals. 5.3cm. Maurizio vein, mined in the 1990s; Alfredo Petrov collection. |
| © alfredo petrov | Photo ID: 81250 View Count: 331 |
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Cerro de Potosí (Cerro Rico), Potosí City, Potosí Department, Bolivia A 5.0 x 3.2 x 3.2 cm matrix, the front side mostly covered by lead-gray micro crystals and crystalline miargyrite. Very rich for the species; neat for this locality! Ex Peter Gillis collection. Ref: The Mineralogical Record 30(1), 9-36. |
| © Dan & Diana Weinrich Minerals | Photo ID: 263271 View Count: 20 |
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Unificada Mine, Cerro de Potosí (Cerro Rico), Potosí City, Potosí Department, Bolivia 16 x 9 x 6 mm. Mounted on a black display base. Crystal-Odyssey specimen. gemcrystals @ aol.com |
| Photo ID: 109091 View Count: 426 | |
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