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Chalcocite

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JYJ757328

Chalcocite

Description Tabs

Description
Locality: 
Butte, Silver Bow County, Montana, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 5 × 2.3 cm
Description

Beautiful metallic chalcocite crystals on pyrite-chalcopyrite matrix from the famous locality Butte, Montana, USA. 

Historic specimen

Mineral Data
What's on the rock

Chalcocite

Formula: 
Cu2S
Strunz: 
2.BA.05
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0