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3 samples matching your criteria
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Sample n°1805 : altered black plate-shaped crystals (10 cm)Minerals: BIOTITEYear:Country: Congo (RDC)
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Sample n°2009 : crystals (5 mm) in debris of greisenMinerals: CASSITERITEYear:Country: Congo (RDC)
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Sample n°4798 : concentrate (5 mm)Minerals: COLUMBITEYear: 1955Country: Congo (RDC)