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Tyrrellite & Umangite

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Tyrrellite & Umangite

Description Tabs

Description
Locality: 
Hal Lake Selenium Occurence #1, Beaverlodge Lake, Saskatchewan, Canada
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
1.2 × 3.3 × 1.3 cm
Description

the rare Copper-Cobalt-Selenide forms white metallic by-pyramidal crystals up to 2 mm together with violet metallic Umangite. Very nice specimens from a new find

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