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Formula: Cu2+3(WO4)2(OH)2
Anhydrous tungstate, forms
pseudomorphs after scheelite
Specific gravity: 5.4 to 6.98 measured, 7.06 calculated
Hardness: 4 to 5
Streak: Greenish grey to greenish yellow
Colour: Emerald-green, brown, olive-green, pistachio-green
Solubility: Readily soluble in acids
Environments
Cuprotungstite is a rare secondary mineral typically
replacing scheelite in a copper-rich
environment. Associated minerals include
scheelite, stolzite and
raspite
(HOM, Mindat).
Localities
The type locality is La Paz, La Paz Municipality, Baja California Sur, Mexico.
At the Gold Hill Mining District, Tooele County, Utah, cuprotungstite is found as
pseudomorphs after scheelite
(KL 218).
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