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Blister Copper

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MMM38917

Blister Copper

Description Tabs

Description
Locality: 
Geevor Mine, Cornwall, United Kingdom
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 6 × 2.5 cm
Description

A quite remarkable specimen from the Treglowns Lode on 14 Level displaying a ribbon of blister copper on jasper matrix, the surface has altered to bornite giving a blue, purple iridescent look.

There is an almost identical but larger specimen from the same location in the Truro Museum.

Mineral Data
What's on the rock

Blister Copper

Variety Of: 

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Hardness: 
3.5 - 4.0
Hardness: 
0.0
Colour: 
Brassy