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3 samples matching your criteria
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Sample n°1775 : rust-coloured powdery impregnation in pegmatiteMinerals: HEMATITE VARISCITEYear:Country: Congo (RDC)
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Sample n°1786 : several small black flattened crystalsMinerals: COLUMBITE TANTALITEYear:Country: Congo (RDC)
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Sample n°1787 : black crystals in white quartzMinerals: TOURMALINE QUARTZYear:Country: Congo (RDC)