Roquesite

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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