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Umangite & Berzelianite

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PDM648688

Umangite & Berzelianite

Rare Mineral

Description Tabs

Description
Locality: 
Bukov Mine, Rožná, Žďár nad Sázavou District, Vysočina Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4 × 2.5 cm
Description

A good specimen with two uncommon selenium-rich minerals, lilac coloured umangite in a mass of metallic grey berzelianite crystals. The matrix is white yellowish calcite that has been sawn and polished in one side.

Acquired in 2012, it is an Ex. A.Gelders #252.

Mineral Data
What's on the rock

Umangite

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

Berzelianite

Formula: 
Cu2Se
Strunz: 
2.BA.20
Crystal System: 
Isometric
Hardness: 
2.0
Streak: 
Shining
Type Locality: 
Skrikerum Mine (Skrickerum Mine), Valdemarsvik, Östergötland, Sweden

Seller Information

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