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Treasurite

Year of discovery: 1976 (Treasury Vault mine, USA), 1996 (Japan)

Locality list: A locality of treasurite

• Ag₇Pb₆Bi₁₅S₃₂
• [Ag⁺₇][Pb²⁺₆][Bi³⁺₁₅][S₃₂]^64-

• Class: Lillianite subgroup < Lillianite group < Large 2D fragment Pb sulfosalts < Sulfosalt class
• Class: Sulfosalt

• Color: Dark gray
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Tiny grain

• Density: 7.3

• System: Monoclinic
• Group: 2/m, B2/m
• Lattice: a=26.5, b=4.1, c=13.3, β=92.8

Etymology: Treasure Vault lode in Colorado, USA, where this mineral is discovered for the first time.