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Chalcocite

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Chalcocite

Description Tabs

Description
Locality: 
Carn Brea Mine, Illogan, Cornwall, United Kingdom
Size Range: 
Small cabinet (7-10 cm)
Size: 
5 × 9 × 4 cm
Largest Crystal: 
0.40cm
Description

Numerous crystals of chalcocite of various habits to 4 mm on quartz, chalcopyrite matrix.

Nice old label with a date of 1847 which gives the location as Redruth, Cornwall. Probably one of the Carn Brea Mines.

Mineral Data
What's on the rock

Chalcocite

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