Arsenide, Löllingite Group
Specific gravity: 7.0 to 7.2
Hardness: 5½ to 6
Streak: Greyish black
Colour: Tin white with faint pinkish hue
Rammelsbergite occurs in nickel and cobalt veins formed at moderate temperatures, with other nickel-cobalt minerals.
Associated minerals include skutterudite,
domeykite and uraninite.
Common impurities: Co,Se,S,Fe,Sb
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