Forms a series with nickelskutterudite
Specific gravity: 6.5
Hardness: 5½ to 6
Colour: Tin-white to silver-grey, grey
Skutterudite is a hydrothermal ore mineral, as are most primary cobalt minerals, (AM102.108-116) found in medium to
high temperature veins with other nickel-cobalt minerals, associated with nickeline,
siderite, baryte and
At Cobalt, Ontario, Canada, skutterudite pseudomorphs after silver have been found (KL p133).
At Reichelsdorf, Hessen, Germany, skutterudite occurs with erythrite (FM 47628).
Common impurities: S,Bi,Cu,Pb,Zn,Ag,Fe,Ni
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