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Luiswishi mine, Democratic Republic of Congo
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Volborthite and Sengierite, Luiswishi Mine, Katanga, Democratic Republic of Congo. In a 3x2x2cm carbonate matrix of green, nipple-like volborthite, a copper vanadate, and a yellow sengierite crystal, a copper urano-vanadate. Formerly sample G. Gauthier, unlabelled.