Formula: Cu9(AsO4)2(SO4)(OH)10.7H2O
Compound arsenate, copper mineral
Specific gravity: 3.09
Hardness: 2
Streak: Pale green
Colour: Pale blue to green

Hydrothermal environments

Parnauite is a rare secondary mineral.

At Cap Garonne mine, France, parnauite is associated with cyanotrichite, brochantite, lavendulan, mansfielditescorodite, chalcopyrite and cornubite (HOM).

At the New cliffe Hill quarry, Stanton under Barton, Leicestershire, England, UK, parnauite has been found with cuprite (RES p197).

At the Gwaithyrafon mine, Wales, UK, parnauite is associated with chrysocolla, brochantite, malachite, tyrolite and connellite (HOM).

At the type locality, Majuba Hill, Nevada, USA, parnauite occurs in the oxidised zone of a hydrothermal copper-tin orebody in rhyolite associated with spangolite, chalcophyllite, chenevixite, goudeyite, malachite, azurite, brochantite and chrysocolla (HOM).

Common impurities: P,C,Al

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