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Bornite with Pyrite & Quartz

#RW47581

Bornite with Pyrite & Quartz

#RW47581
Availability
Sold
Size
15 x 7 x 3.5 cm - Cabinet 
Formula
Cu5FeS4 (RRUFF)
Locality
Leonard mine, Butte dist., Silver Bow Co., Montana, United States
Tagged
sulfide , copper

A plate full of dark bluish to almost black virtually formless crystal masses of Bronite with Pyrite and Quartz. Like the Comstock and the Homestake mines, specimens are scarce from Butte. 

Bornite

Formula
Cu5FeS4 
Crystal System
Orthorhombic 
Crystal Habit
Massive - Granular, Reniform, Granular 
Cleavage
Imperfect, None, None 
Luster
Metallic 
Color
copper red, bronze brown, purple 
Streak
grayish black 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness

Data courtesy of Webmineral.

Collection
Robert Waidler Collection
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