Formula: (Cu,Ag)21(Pb,Bi)2S13
Origin of name: For Fred LaRose, Canadian blacksmith
Crystal system: Orthorhombic
Crystal class: Unknown
Twinning:
Unit cell:
Colour: White-buff (polished section)
Diaphaneity: Opaque
Luster: Metallic
Habit: Crystals acicular or flame-like, microscopic
Hardness: 3
Specific gravity: 6.19
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Found in polished section only
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