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Betekhtinite with Bornite & Quartz

#45876

Betekhtinite with Bornite & Quartz

#45876
Availability
Sold
Size
8 x 7 x 4 cm - Sm Cabinet 
Formula
(Cu,Fe)21Pb2S15 (RRUFF)
Locality
Butte dist., Silver Bow Co., Montana, United States
Tagged
sulfide , copper

The Betekhtinite is scarce on this specimen but very visible and can be seen as elongated steely gray prismatic crystals intimately associated with groups of tarnished Bornite groups to 8mm. The Quartz is nice and waterclear to 2cm some with included Hematite(?). 

Betekhtinite

Formula
(Cu,Fe)21Pb2S15 
Crystal System
Orthorhombic 
Crystal Habit
Acicular 
Cleavage
Distinct, Distinct, Distinct 
Luster
Metallic 
Color
brownish black 
Streak
black 
Class
Orthorhombic - Dipyramidal 
Hardness

Data courtesy of Webmineral.

Collection
Chris van Laer Collection

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