Formula: Ag5Sb(Se,S)4
Origin of name: from composition and stephanite
Crystal system: orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: grayish white with olive tint in reflected light
Diaphaneity:
Luster:
Habit: crystals platy, 0.005 to 0.08 mm irregular aggregates
Hardness: 3
Specific gravity: 7.5 to 4.5
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments: found in polished section only
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