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Bornite with Apatite, Quartz, and Pyrite

#PD32424

Bornite with Apatite, Quartz, and Pyrite

#PD32424
Availability
Sold
Size
15 x 8 x 4.5 cm - Cabinet 
Formula
Cu5FeS4 (RRUFF)
Locality
Leonard mine, Butte dist., Silver Bow Co., Montana, United States
Tagged
sulfide , ore specimen

A large plate of dull, dark blue to almost black Bornite crystals to over 2cm with the center piece showing Bornite perhaps encrusting or pseudomorphing Covellite or Chalcocite. Associate mineral include Pyrite and Quartz and tiny, prismatic Apatite crystals. This is an outstanding specimen and belongs in a museum or the home of a seasoned Butte collector.

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
Phillips Collection
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