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1 item @ $25.00  

Domeykite with Nickeline

#65895

Domeykite with Nickeline

#65895
Availability
Sold
Size
5.5 x 5.5 x 5 cm - Sm Cabinet 
Formula
Cu3As (RRUFF)
Locality
Mohawk mine, Keweenaw Co., Michigan, United States
Tagged
copper

Heavy mass of arsenides and it's hard to discern them without the aid of an EDS and XRD. Mostly though seems to be some brassy Nickeline and whiteish gray Domeykite. It's a good specimen as large as it is and green and blue alterations.

Domeykite

Formula
Cu3As 
Crystal System
Isometric 
Crystal Habit
Botryoidal, Reniform, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
gray, yellow brown, silver white, tin white 
Streak
black gray 
Class
Isometric - Hextetrahedral 
Fracture
Brittle - Sectile 
Hardness
3-3.5 

Data courtesy of Webmineral.

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