Kobyashevite

kobyashevite

devilline group

Kapital'naya mine

San Miguel County

Images

Formula: Cu₅(SO₄)₂(OH)₆.4H₂O
Valence: Cu²⁺₅(S⁶⁺O₄)₂(OH)₆.4H₂O
Hydrated sulphate of copper, devilline group
Crystal system: Triclinic
Specific gravity: 3.16 calculated
Hardness: 2½
Streak: Pale bluish green
Colour: Bluish green to turquoise
Luminescence: Not fluorescent under UV
Solubility: Decomposes in water within 10 minutes
Environments

Hydrothermal environments

Localities

At the type locality, Kapital'naya mine, Buldym Lake, Vishnevye Mountains, Chelyabinsk Oblast, Russia, kobyashevite occurs as elongated crystals up to 0.2 mm typically curved or split and combined into thin crusts up to 1 × 2 mm², in cavities of a calcite-quartz vein. Associated minerals include chalcopyrite and pyrite (Mindat).
Kobyashevite from Kapital'naya mine - Image

At San Miguel County, Colorado, USA, kobyashevite has been found (Mindat photo).
Kobyashevite from San Miguel County - Image

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