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Chalcocite

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JYJ606225

Chalcocite

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Description
Locality: 
Bristol Copper Mine, Hartford County, Connecticut, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5 × 3 cm
Description

Excellent chalcocite from Bristol copper mines. Associated minerals are quartz and calcite. Historical sample. 

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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