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0 item @ $0.00  

Chalcocite with Quartz

#PD31830

Chalcocite with Quartz

#PD31830
Availability
Sold
Size
7.5 x 6.5 x 4 cm - Sm Cabinet 
Formula
Cu2S (RRUFF)
Locality
Mountain Consolidated mine, Butte, Silver Bow Co., Montana, United States
Tagged
sulfide , ore specimen

Outstanding specimen with stell grey free-standing swords of Chalcocite to 9mm generally averaing 5mm. There is a slight iridescence of a blue tone. Very little damage to this specimen for being so old and historic.

Chalcocite

Formula
Cu2
Crystal System
Monoclinic 
Crystal Habit
Massive, Granular, Euhedral Crystals 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
blue black, gray, black, black gray, steel gray 
Streak
grayish black 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
2.5-3 

Data courtesy of Webmineral.

Collection
Phillips Collection

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