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Bornite with Calcite

#PD31838

Bornite with Calcite

#PD31838
Availability
Sold
Size
6 x 6 x 3 cm - Sm Cabinet 
Formula
Cu5FeS4 (RRUFF)
Locality
Mountain Consolidated mine, Butte, Silver Bow Co., Montana, United States
Tagged
sulfide , ore specimen

Aesthetic specimen of Bornite matrix with flat-lying white Calcite crystals to 3cm. On the side you can see the clear definition of the ore vein as it penetrated the Butte quartz monzonite matrix.

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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Previously Sold Bornite
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