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Coloradoite

Year of discovery: 1877 (Smuggler mine, USA, Keystone mine, USA, and Mountain Lion mine, USA), 1977 (Japan)

Locality list: 3 localities of coloradoite

• HgTe
• [Hg²⁺][Te]^2-

• Class: Sphalerite group
• Class: Telluride

• Hg => Ag: Empressite
• Hg => Cu: Vulcanite
• Hg => Bi: Tsumoite
• Hg => Pb: Altaite

• Te => S: Metacinnabar (α), Cinnabar, Hypercinnabar
• Te => Se: Tiemannite

• Color: Iron black
• Streak: Black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Granular

• Cleavage: No
• Hardness: 2.5
• Density: 8.1

• System: Cubic
• Group: m3m, Fm3m
• Lattice: a=6.5

Etymology: Colorado, USA where Keystone and Mountain Lion mine and Smuggler mine are located.