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Bismuthinite & Bismutite On Blister Copper

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CLB52545

Bismuthinite & Bismutite On Blister Copper

Description Tabs

Description
Locality: 
Tazna, Cerro Tazna, Atocha-Quechisla, Nor Chichas Province, Potosi Department, Bolivia
Size Range: 
Small cabinet (7-10 cm)
Size: 
3.3 × 9.4 × 6.1 cm
Largest Crystal: 
2.70cm
Description

Elongated bismuthinite crystals up to 2.7 cm with and on botryoidal chalcopyrite (blister copper) plus a lot of bismutite as a white crust on the backside. Large specimen, heavy for it's size.

Mineral Data
What's on the rock

Bismuthinite

Formula: 
Bi2S3
Strunz: 
2.DB.05
Hardness: 
2.0 - 2.5
Streak: 
Lead-gray

Bismutite

Formula: 
(BiO)2CO3
Strunz: 
5.BE.25
Crystal System: 
Tetragonal
Hardness: 
2.5 - 3.5
Streak: 
Grey
Type Locality: 
Arme Hilfe Mine, Ullersreuth, Hirschberg, Vogtland, Thuringia, Germany

Blister Copper

Variety Of: 

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Hardness: 
3.5 - 4.0
Hardness: 
0.0
Colour: 
Brassy

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