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Benjaminite

Ag3Bi7S12

• Class: Pavonite Group, Sulfosalt

• Color: Gray
• Streak: Yellow-Pale brown
• Luster: Metallic, slightly Greasy
• Diaphaneity: Opaque

• Aggregate: Mixed with other similar mineral phases
• Twin: not rare

• Cleavage: Obvious, parallel to elongation
• Hardness: 3.5

• System: Monoclinic
• Group: 2/m, P2/m
• Lattice: a=13.3, b=4.1, c=20.3, a^c=103.1

Name: Dr. Marcus Benjamin (1857-1932), curator of the National Museum of America, USA

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(c) 2010 NariNari@NariNari Mine