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Carrollite

Carrollite – CuCo₂S₄

Elements: Copper, Cobalt, Sulfur

Class: Sulfides

Crystal System: Cubic

Hardness: 4.5-5.5

Apatite

Talc (1)Diamond (10)

About as hard as a steel knife blade.

Origin: Kamoto, Kolwezi Mining District, Lualaba – Congo (drc)