Formula: AgAsS2
Origin of name: George F.H. Smith, British crystallographer
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: light red to brownish orange
Diaphaneity: opaque to translucent (thin fragments)
Luster: adamantine
Habit: crystals equant or tabular with hexagonal aspect
Hardness: 1.5 to 2
Specific gravity: 4.88
Cleavage: 1; {100} perfect
Tenacity:
Streak: red
Synonyms/varieties:
Comments: dimorphous with trechmannite
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