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Specimens online:418
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Cornwallite - La Atalaya prospect, Pastrana, Mazarrón, Murcia, Spain (#:MINS9030)

Specimen rich of bluish-green,Cornwallite spheres up to 2 mm set on matrix.

Formula :
Cu₅[(OH)₂/AsO₄]₂
System: monoclinic Hardness:4½ Rarity:not common
Strunz id:VII/B.11-40 - PHOSPHATES, ARSENATES and VANADATES
Name origin: Named in 1846 by František Xaver Maximilian Zippe after Cornwall, England, wherein lies the type locality.