Chalcocite CuS2 Flambeau Mine, Ladysmith, Rusk Co., Wisconsin Ex Tom Donnelly
Chalcocite CuS2 with Sphalerite, Franklin,, Sussex Co., New Jersey
Chalcocite CuS2 with Calcite and Basalt, Baltic Mine, Baltic, Houghton Co., Michigan
Chalcocite CuS2 with Calcite and Basalt, Baltic Mine, Baltic, Houghton Co., Michigan
Chalcocite CuS2
Chalcocite CuS2
Chalcocite CuS2
Chalcocite CuS2
Chalcocite CuS2 with Calcite and Basalt, Baltic Mine, Baltic, Houghton Co., Michigan
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