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Tyrrellite Umangite & Chalcomenite

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SKY591793

Tyrrellite Umangite & Chalcomenite

Rare Mineral

Description Tabs

Description
Locality: 
Beaverlodge Region, Saskatchewan, Canada
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.8 × 0.4 × 0.3 cm
Description

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

Mineral Data
What's on the rock

Tyrrellite

Formula: 
Cu(Co3+,Ni3+)2Se4
Strunz: 
2.DA.05
Hardness: 
3.5
Colour: 
Bronze
Streak: 
Black
Type Locality: 
Eagle Claims U-Cu-Se Occurrence, Eagle shaft area, Melville Lake, Goldfields District, Beaverlodge Region, Saskatchewan, Canada

Umangite

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

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

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