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Chalcostibite

Type Locality
Graf Jost-Christian Mine, Wolfsberg, Stolberg, Harz, Saxony-Anhalt, Germany
Mineral Data
CuSbS2
Strunz: 
2.HA.05
Physical Properties
Crystal System: 
Orthorhombic
Streak: 
black
Hardness: 
3.0 - 4.0
Tenacity: 
brittle