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Skutterudite

Skutterudite – CoAs₃

Elements: Cobalt, Arsenic

Class: Sulfides

Crystal System: Cubic

Hardness: 5.5-6

Orthoclase

Talc (1)Diamond (10)

Scratches glass. Harder than a steel knife.

Origin: Bou Azzer Districit, Tasenakht – Morocco