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3 samples matching your criteria
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Sample n°532 : mixed debrisMinerals: CHALCEDONY (quartz) QUARTZYear: 1913Country: Congo (RDC)
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Sample n°534 : plate-shaped crystals in pegmatiteMinerals: MUSCOVITEYear: 1913Country: Congo (RDC)
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Sample n°536 : black crystals in quartz fragmentsMinerals: TOURMALINE QUARTZYear: 1913Country: Congo (RDC)