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Tetrahedrite with Chalcopyrite

#PD30390

Tetrahedrite with Chalcopyrite

#PD30390
Availability
Sold
Size
7.5 x 4.5 x 3 cm - Sm Cabinet 
Formula
Cu12Sb4S13 (RRUFF)
Locality
Herodsfoot mine, Liskeard, Cornwall, England
Highly sought after are specimens such as this one from the Herodsfoot mine. As is typical from Heredsfoot, Tetrahedrite crystals are coated with Chalcopyrite. This specimen is no exception with 10 or 12 Tetraherite crystals from 5mm to 1cm in size. All are coated nicely with Chalcopyrite. The matrix is Galena. Comes with a David New label.

Tetrahedrite

Formula
Cu12Sb4S13 
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
iron gray, black, steel gray 
Streak
black 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
3.5-4 

Data courtesy of Webmineral.

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