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Chalcocite

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MMM46600

Chalcocite

Description Tabs

Description
Locality: 
Levant Mine, Pendeen, Cornwall, United Kingdom
Size Range: 
Thumbnail (1-3cm)
Size: 
1.2 × 0.9 × 0.7 cm
Description

A highly unusual detached crystal of chalcocite displaying parallel crystals forming a tapered columb ending in one complete crystal face.

Nice irredence, no damage.

Mineral Data
What's on the rock

Chalcocite

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