Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Chalcocite On Tennantite

Views:
Watches:
MMM34299

Chalcocite On Tennantite

Description Tabs

Description
Locality: 
Geevor Mine, Cornwall, United Kingdom
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 8 × 1.5 cm
Largest Crystal: 
0.30cm
Description

A plate of iridescent bornite with micro crystalline tennantite covered on one side with hundreds of bright undamaged chalcocite crystals of varying habits to 3 mm.

Quite a remarkable Cornish specimen.

Mineral Data
What's on the rock

Chalcocite

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

Tennantite

Formula: 
Cu6[Cu4(Fe,Zn)2]As4S13
Strunz: 
2.GB.05
Crystal System: 
Isometric
Hardness: 
3.0 - 4.5
Type Locality: 
Cornwall, England, UK