Green crystals of the very rare copper vanadate mineral turanite from one of the only four known localities worldwide. From: The Fish, Gibellini District, Eureka County, Nevada, United States of America. — Photo: David Hospital · CC BY-SA 4.0
Turanite
Turanite is an IMA-recognized mineral species in the vanadate class, with the chemical formula Cu²⁺₅(VO₄)₂(OH)₄.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: Mohs hardness 5; specific gravity 4.898; optically biaxial.
IMA symbol Trn, grandfathered status — known before the IMA’s founding, named in 1909.
A rare secondary oxidation mineral in vanadium-bearing mineral deposits.
It is found associated with Tangeite, other vanadates, uranovanadates, malachite, calcite, barite.
The name refers to the Turan region, Kyrgyzstan, where the mineral was first found.