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Masuyite (red spherical aggregates) and becquerelite (yellow) with fourmarierite (dark red/umber), on uraninite matrix, from Shinkolobwe, Katanga, Democratic Republic of Congo
Image of specimen 'Merwinite NMNH 120933' (Smithsonian Institution - National Gem Collection) from Old Commercial Quarry, Crestmore, Riverside Co., CA, USA. Weight: 4.71 ct
Unknown photographer, Smithsonian Institution, Public Domain