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Copper & Cuprite

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MGR723122

Copper & Cuprite

Floater

Description Tabs

Description
Locality: 
Copper Falls Mine, Keweenaw County, Michigan, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
14 × 6.4 × 5.4 cm
Description

A really uncommon specimen, the copper is naturally rounded and seems to be covered with a layer of cuprite var. Chalkotrichite, which causes the more red color of the specimen. Developed as floater, no significant damages to report.

Mineral Data
What's on the rock

Copper

Formula: 
Cu
Strunz: 
1.AA.05
Crystal System: 
Isometric
Hardness: 
2.5 - 3.0

Cuprite

Formula: 
Cu2O
Strunz: 
4.AA.10
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0
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