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29 samples matching your criteria
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Sample n°386 : massive tourmaline within quartzMinerals: TOURMALINE QUARTZYear: 1913Country: Congo (RDC)
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Sample n°387 : crust on black rockMinerals: CALCITE CHLORITEYear: 1913Country: Congo (RDC)
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Sample n°389 : black prismatic crystals (2 cm) in quartz debrisMinerals: TOURMALINEYear:Country: Rwanda
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Sample n°483 : purplish black breccious blockMinerals: HEMATITEYear: 1922Country: Congo (RDC)
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Sample n°513 : fibrous plate covered by bronze-coloured micaMinerals: SILLIMANITE PHLOGOPITEYear: 1913Country: Congo (RDC)
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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)
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Sample n°560 : zoned block (pink, blue, yellow)Minerals: CHALCEDONY (quartz)Year: 1913Country: Congo (RDC)
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Sample n°593 : gold-bearing quartz veinMinerals: QUARTZ GOLDYear: 1914Country: Congo (RDC)