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42 samples matching your criteria
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Sample n°10072 : banded pink material on fibrous quartzMinerals: CHALCEDONY (quartz) QUARTZYear: 1964Country: Congo (RDC)
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Sample n°10074 : clear crystals (6 cm) on pink banded chalcedonyMinerals: QUARTZ CHALCEDONY (quartz)Year: 1964Country: Congo (RDC)
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Sample n°10075 : grey quartz crystals (1 cm), specular black hematite fibres, green microcrystalline and powdery epidoteMinerals: EPIDOTE HEMATITE QUARTZYear: 1963Country: Congo (RDC)
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Sample n°10076 : dull black prismatic quartz crystals (2 cm), mass of white calcite nodules, olive-coloured powder (epidote)Minerals: CALCITE CHALCEDONY (quartz) EPIDOTE QUARTZYear: 1963Country: Congo (RDC)
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Sample n°10077 : transparent twinned crystal (13 cm)Minerals: CALCITEYear: 1963Country: Congo (RDC)
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Sample n°10078 : transparent yellow calcite crystalsMinerals: CALCITE QUARTZYear: 1963Country: Congo (RDC)
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Sample n°10079 : dull red prismatic quartz crystals and calcite crystals on doleriteMinerals: QUARTZ CHALCEDONY (quartz) CALCITEYear: 1963Country: Congo (RDC)
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Sample n°10080 : yellow rhombohedral crystalsMinerals: CALCITEYear: 1963Country: Congo (RDC)
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Sample n°10081 : amygdales in lavaMinerals: CALCITEYear: 1963Country: Congo (RDC)
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Sample n°10082 : rhombohedral iceland spar (4 cm)Minerals: CALCITEYear: 1963Country: Congo (RDC)