Chalcostibite

chalcostibite

skinnerite

jamesonite

dadsonite

Images

Formula: CuSbS₂
Sulphosalt, chalcostibite group, antimony-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 4.9 to 5.0 measured, 5.011 calculated
Hardness: 3 to 4
Streak: Black
Colour: Lead-grey, iron grey
Common impurities: Pb,Fe,Zn
Environments

Hydrothermal environments

Chalcostibite occurs in hydrothermal veins associated with jamesonite, chalcopyrite, pyrite, tetrahedrite, stibnite, andorite, stannite, dadsonite, siderite, baryte and quartz (HOM, Mindat).

Localities

The type locality is the Graf Jost-Christian Mine, Wolfsberg, Stolberg, Südharz, Mansfeld-Südharz, Saxony-Anhalt, Germany.

Alteration

chalcostibite and chalcocite to skinnerite
CuSbS₂ + Cu₂S → Cu₃SbS₃
(CM 28.725-738)

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