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Chalcocite

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CLB173792

Chalcocite

ex collection Shannon & Sons
Classic Locality

Description Tabs

Description
Locality: 
Bristol Copper Mine, Bristol, Hartford County, Connecticut, United States of America
Size Range: 
Thumbnail (1-3cm)
Size: 
1.6 × 1.1 × 0.6 cm
Description

Very nice rare old thumbnail. A group of well-defined chalcocite crystals. No matrix. A few siderite crystals.

Mineral Data
What's on the rock

Chalcocite

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

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