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Bornite

#PD32995

Bornite

#PD32995
Availability
Sold
Size
9 x 10 x 2 cm - Cabinet 
Formula
Cu5FeS4 (RRUFF)
Locality
Eagle Picher mine, Shullsburg, Lafayette Co., Wisconsin, United States
Tagged
sulfide

Large plate of bluish to purple iridescent Bornite with crystals to 6mm. Specimens such as these are seldom offered on the market. Not only is this a hard locality to obtain, but the natural Bornite patina adds to the appeal of this sulfide. Mines in this district a virtually extinct as they have either been reclaimed or swallowed up by the urban sprawl. Excellent specimen.

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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