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Chalcocite Covellite & Tenorite

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CLB634172

Chalcocite Covellite & Tenorite

Pseudomorph

Description Tabs

Description
Locality: 
Mammoth - St Anthony Mine, Tiger, Mammoth District, Pinal County, Arizona, United States of America
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.4 × 3.2 cm
Description

Well, to tell the truth: I'm not sure what we've got here. Labeled as 'cuprite' and 'native copper'. Surelay there's more behind that combination. I'm pretty sure about the metallic gray species - tenorite. There are octahedrons, which might just be cuprite, but could also be murdochite. The most interesting to me are the hollow crystals - surely pseudomorphs of some kind, of c halcocite-covellite. The only mineral which fits in with beige crystals at this locality is stolzite, but that's a far fetch. If you have possibillities to have this analyzed, this is a 'must have' specimen for you.

Mineral Data
What's on the rock

Chalcocite

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

Covellite

Formula: 
CuS
Strunz: 
2.CA.05a
Crystal System: 
Hexagonal
Hardness: 
1.5 - 2.0
Type Locality: 
Mt Vesuvius, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Tenorite

Formula: 
CuO
Strunz: 
4.AB.10
Crystal System: 
Monoclinic
Hardness: 
3.5
Streak: 
Black
Type Locality: 
Mt Vesuvius, Somma-Vesuvius Complex, Naples Province, Campania, Italy

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