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Cupropearceite

Type Locality
Sarbaiskoe deposit (Sarbai Mine; Sarbay Mine), Rudny, Kostanay Province (Qostanay Oblysy; Kostanai Oblast'), Kazakhstan
Mineral Data
[Cu6As2S7][Ag9CuS4]
Strunz: 
2.GB.15
Physical Properties
Hardness: 
0.0