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Krupkaite - Krupka, Krušné Hory Mts (Erzgebirge), Ústí Region, Bohemia,Czech Republic - TYPE LOCALITY (#:MINS9191)

Krupkaite in grey striated cristal 3 mm long set on quartz Matrix from the type locality.

Formula :
PbCuBi₃S₆
System: orthorhombic Hardness:3½-4 Rarity:very rare
Strunz id:II/E.30-50 - SULFIDES
Name origin: Named from from the type locality. (Krupka (Graupen), Krušné Hory Mts (Erzgebirge), Ústí Region, Bohemia (Böhmen; Boehmen), Czech Republic)