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Bornite with Pyrite

#PD31823

Bornite with Pyrite

#PD31823
Availability
Sold
Size
9 x 11 x 4 cm - Cabinet 
Formula
Cu5FeS4 (RRUFF)
Locality
Butte dist., Silver Bow Co., Montana, United States
Tagged
sulfide

Platy crysals of Bornite with a typical peacock-iridesence with brassy Pyrite.

Founded in 1879 Butte was considered 'The Richest Hill on Earth' and by 1902 17-20% of US Copper production came from Butte. For a great read on the history of Butte check out the DMM article, The Butte Mining District, Butte, Montana - A Summary of the History, Geology and Minerals.

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
Mineralpedia
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Previously Sold Bornite
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Other Available Bornite
WebMineral
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