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Oursinite: (Co,Mg)(H3O)2[(UO2)SiO4]2·3(H2O)
Comments: Yellow velvety acicular sprays of oursinite crystals on matrix. Location: Shinkolobwe Mine (Kasolo Mine), Shinkolobwe, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaire). Scale: Picture Size 8 x 6 mm. © Sandro Maggia/Minernet.it