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Chalcomenite & Umangite

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SKY905248

Chalcomenite & Umangite

Rare Mineral

Description Tabs

Description
Locality: 
Hal Lake Selenium Occurence #1, Beaverlodge Lake, Saskatchewan, Canada
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 1.8 × 1.6 cm
Description

Black crystal aggregates of umangite and blue crystals of chalcomenite. Two selenium minerals in one specimen !

Ex Vandenbroucke Museum collection from Waregem, Belgium.

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

Umangite

Formula: 
Cu3Se2
Strunz: 
2.BA.25
Crystal System: 
Tetragonal
Hardness: 
3.0
Streak: 
Black
Type Locality: 
Trogtal Quarries, Lautenthal, Harz, Lower Saxony, Germany

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