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Chalcopyrite with Chalcocite

#PD53680

Chalcopyrite with Chalcocite

#PD53680
Availability
Sold
Size
7 x 5 x 2.5 cm - Sm Cabinet 
Formula
Cu1+Fe3+S2 (RRUFF)
Locality
St. Joe No. 3 mine, Balmat, St. Lawrence Co., New York, United States
Tagged
sulfide , copper

Golden Chalcopyrite, massive, with tiny Chalcocite crystals to 1 or 2mm coated with bluish-purple iridescent Chalcopyrite. I did not realize what a nice specimen this is until I decided to scope it prior o publishing. There are numerous micro crystals and a lot of interesting areas.

Chalcopyrite

Formula
Cu1+Fe3+S2 
Crystal System
Tetragonal 
Crystal Habit
Euhedral Crystals, Striated, Druse 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
brass yellow, honey yellow 
Streak
greenish black 
Class
Tetragonal - Scalenohedral 
Fracture
Brittle 
Hardness
3.5 

Data courtesy of Webmineral.

Collection
Don Phillips Collection

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