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Covellite coated with Chalcopyrite with Pyrite

#PD31832
SOLD
Covellite from Stewart mine, Butte, Silver Bow Co., Montana, United States - PD31832
Covellite from Stewart mine, Butte, Silver Bow Co., Montana, United States - PD31832

Covellite coated with Chalcopyrite with Pyrite

#PD31832
Availability
Sold
Size
9 x 6.5 x 4 cm - Sm Cabinet 
Formula
CuS (RRUFF)
Locality
Stewart mine, Butte, Silver Bow Co., Montana, United States
Tagged
sulfide

Excellent specimen with large Pyrite crystals to 1cm averaging 6mm. Along the center of this specimen are what I believe are Covellite crystals to 1cm coated with or replaced by iridescent blue to green Chalcopyrite. Originally labeled as Wurtzite with Pyrite, however, I do not see any evidence of this mineral.

Covellite

Formula
CuS 
Crystal System
Hexagonal 
Crystal Habit
Platy, Foliated 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
indigo blue, light blue, dark blue, black 
Streak
black gray 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle 
Hardness
1.5-2 

Data courtesy of Webmineral.

Collection
Phillips Collection
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