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  3 samples matching your criteria
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        Sample n°20348 : crystals in granular quartzMinerals: TOURMALINEYear:Country: Congo (RDC)
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        Sample n°20349 : abundant fine-grained tourmaline in matrixMinerals: TOURMALINEYear:Country: Congo (RDC)
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        Sample n°20350 : coarse-crystalline brown materialMinerals: DOLOMITEYear:Country: Congo (RDC)