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Bornite & Enargite

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BCK501950

Bornite & Enargite

Description Tabs

Description
Locality: 
Bellona Mine, Berkeley Pit, Butte, Silver Bow County, Montana, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.8 × 1.3 × 1 cm
Description

You are bidding on a small and beautiful specimen of bornite crystals from Butte. On the bornite there are some nice prismatic enargite crystals. Really nice piece that my photos don't do justice.

Mineral Data
What's on the rock

Bornite

Formula: 
Cu5FeS4
Strunz: 
2.BA.15
Crystal System: 
Tetragonal
Hardness: 
3.0
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Enargite

Formula: 
Cu3AsS4
Strunz: 
2.KA.05
Crystal System: 
Orthorhombic
Hardness: 
3.0
Streak: 
Black.
Type Locality: 
San Francisco vein, Morococha District, Yauli Province, Junín Department, Peru

Seller Information

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