Formula: CuInS2
Origin of name: for M. Roques, French geologist
Crystal system: tetragonal
Crystal class: -42m
Twinning:
Unit cell:
Colour: gray, slightly bluish tint
Diaphaneity: opaque
Luster: metallic
Habit: crystals subhedral to rounded grains, to 10 micron
Hardness: 3.5 to 4
Specific gravity: 4.80
Cleavage:
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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