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237 samples matching your criteria
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Sample n°16676 : fragmentsMinerals: COLUMBITE TANTALITEYear:Country: Burundi
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Sample n°6548 : columbite-tantalite in pegmatite matrixMinerals: COLUMBITE TANTALITEYear:Country: Rwanda
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Sample n°10626 : fragmentsMinerals: COLUMBITEYear:Country: Rwanda
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Sample n°15961 : plate-shaped fragmentsMinerals: COLUMBITE TANTALITEYear:Country: Rwanda
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Sample n°15979 : concentrateMinerals: COLUMBITE TANTALITEYear:Country: Rwanda
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Sample n°15978 : concentrateMinerals: COLUMBITE TANTALITEYear:Country: Rwanda
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Sample n°12493.1 : large crystal (5 cm)Minerals: COLUMBITEYear: 1970Country: Rwanda
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Sample n°12493.2 : crystals and crystal fragmentsMinerals: COLUMBITEYear: 1970Country: Rwanda
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Sample n°12493.22 : crystalsMinerals: COLUMBITEYear: 1970Country: Rwanda
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Sample n°12493.33 : prismatic crystalMinerals: COLUMBITEYear: 1970Country: Rwanda