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  153 samples matching your criteria
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        Sample n°16666 : crystal fragmentsMinerals: COLUMBITE TANTALITEYear:Country: Burundi
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        Sample n°16674 : large crystals on matrixMinerals: COLUMBITE TANTALITEYear:Country: Burundi
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        Sample n°16672 : large plate, and fragments with coltan in matrixMinerals: COLUMBITE TANTALITEYear:Country: Burundi
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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°2005 : crystals in greisenMinerals: TANTALITEYear:Country: Rwanda
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        Sample n°15961 : plate-shaped fragmentsMinerals: COLUMBITE TANTALITEYear:Country: Rwanda
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        Sample n°15938 : fragmentMinerals: MICROLITE 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