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Chalcomenite Olsacherite Clinochalcomenite Penroseite & Krut'aite

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Chalcomenite Olsacherite Clinochalcomenite Penroseite & Krut'aite

Classic Locality
Analysed

Description Tabs

Description
Locality: 
El Dragón Mine, Quijarro Province, Potosi Department, Bolivia
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.45 × 1 × 1.3 cm
Description

Very nice, multimineral specimen of rare selenium minerals from classic location. Silver-grey matrix of mixture of Penroseite with Krutait contain crust of blue Chalcomenite with bluish green Clinochalcomenite and vug with crystals (!) of Chalcomenite and fibrous Olsacherite crystals (!). Analysed!

Mineral Data
What's on the rock

Chalcomenite

Formula: 
CuSeO3·2H2O
Strunz: 
4.JH.05
Crystal System: 
Orthorhombic
Hardness: 
2.0 - 2.5
Type Locality: 
Cerro de Cacheuta, Sierra de Cacheuta, Mendoza, Argentina

Olsacherite

Formula: 
Pb2(SeO4)(SO4)
Strunz: 
7.AD.35
Hardness: 
3.0 - 3.5
Type Locality: 
Virgen de Surumi mine (Pacajake mine; Pakajake mine), Pakajake Canyon (Pacajake Canyon), Chayanta Province, Potosí Department, Bolivia

Clinochalcomenite

Formula: 
CuSeO3 · 2H2O
Strunz: 
4
Crystal System: 
Monoclinic
Hardness: 
2
Colour: 
Bluish green
Streak: 
Pale Green
Type Locality: 
Gansu (Ganzu) Province, China

Penroseite

Formula: 
(Ni,Co,Cu)Se2
Strunz: 
2.EB.05a
Hardness: 
2.5 - 3.0
Type Locality: 
Virgen de Surumi mine (Pacajake mine; Pakajake mine), Pakajake Canyon (Pacajake Canyon), Chayanta Province, Potosí Department, Bolivia

Krut'aite

Formula: 
CuSe2
Strunz: 
2.EB.05a
Hardness: 
4.0
Type Locality: 
Petrovice, Nové Město na Moravě, Vysočina Region, Moravia (Mähren; Maehren), Czech Republic

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