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Cornetite: Cu3(PO4)(OH)3
Comments: Crystals of cornetite on matrix. Location: Etoile Mine, Katanga Province, Dem. Rep. of Congo. Scale: Crystal size 0.5 cm. © John Veevaert
Comments: Radial groups of intense blue cornetite crystals in green malachite. Location: Mine de l'Etoile, Shaba, Lubumbashi Zaire. Scale: Picture size 5 cm. © Fabre Minerals