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Bornite with Tennantite & Enargite - copper ore

#58568

Bornite with Tennantite & Enargite - copper ore

#58568
Availability
Sold
Size
15 x 5.5 x 5 cm - Cabinet 
Formula
Cu5FeS4 (RRUFF)
Locality
Chelopech Au-Cu Mine, Sofia Province, Bulgaria
Tagged
copper , ore specimen , sulfides

Rich specimen full of iridescent Bornite with some Tennantite and Enargite. Bornite is a common and widespread copper ore found in hydrothermal deposits in the supergene enrichment zones of copper porphyries. The specimen comes with an old company report which describes the locality, history and geology. 

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.

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