Kuramite
A stannite-group copper-tin sulfide named for the Kochbulak gold deposit in Uzbekistan's Kuraminskii mountains.
Intro adapted from Wikipedia (CC BY-SA).
Kuramite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Cu₃SnS₄.
It crystallizes in the tetragonal crystal system (space group I-42m). It is a member of the Sphalerite, Stannite structural group.
Key properties: specific gravity 4.56; Metallic. Anisotropism: Distinct, in shades of brown streak.
IMA symbol Ku, IMA status: approved, named in 1979.
Found in gold–sulfide–quartz veins, as inclusions in goldfieldite (Kochbulak deposit, Uzbekistan).
It is found associated with Goldfieldite, famatinite, hessite, petzite, sylvanite, altaite, gold, chalcostibite, emplectite, mohite, mawsonite, cassiterite (Kochbulak deposit, Uzbekistan).
The name refers to the occurrence in the Kuramin Mountains, Uzbekistan.