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  4 samples matching your criteria
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        Sample n°4767 : concentrate (1 cm)Minerals: COLUMBITE TANTALITEYear: 1954Country: Congo (RDC)
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        Sample n°4768 : concentrate (8 mm), radioactiveMinerals: COLUMBITE TANTALITEYear: 1954Country: Congo (RDC)
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        Sample n°4769 : tabular crystals (1-2 cm)Minerals: COLUMBITE TANTALITEYear: 1954Country: Congo (RDC)
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        Sample n°4770 : tabular crystals (1-2 cm)Minerals: COLUMBITE TANTALITEYear: 1954Country: Congo (RDC)