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Chalcomenite & Malachite

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RHT711756

Chalcomenite & Malachite

ex collection Prof. Wotruba
Rare Mineral

Description Tabs

Description
Locality: 
El Dragón Mine, Quijarro Province, Potosi Department, Bolivia
Class: 
Combination
Size Range: 
Thumbnail (1-3cm)
Size: 
2.1 × 1.7 × 1.7 cm
Weight: 
11.00gr
Description

Very interesting specimen. Glassy blue chalcomenite with balls of pale green malachite on matrix with pseudomorphs of unknown rather big blocky crystals, coated with a black crust - maybe klockmannite?

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

Malachite

Formula: 
Cu2(CO3)(OH)2
Strunz: 
5.BA.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0