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Chalcomenite Clinochalcomenite & Aragonite

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CLB513140

Chalcomenite Clinochalcomenite & Aragonite

ex collection Prof. H. Wotruba
Rare Mineral

Description Tabs

Description
Locality: 
El Dragón Mine, Quijarro Province, Potosi Department, Bolivia
Class: 
Combination
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.5 × 1.3 cm
Description

Green clinochalcomenite and blue chalcomenite on dark matrix. Both are rare selenium minerals. The white acicular mineral is aragonite.

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

Clinochalcomenite

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

Aragonite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.15
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Type Locality: 
Gallo river, Molina de Aragón, Guadalajara, Castile-La Mancha, Spain

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