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2 samples matching your criteria
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Sample n°2468 : zoned chalcedony with geodes of microcrystalline quartzMinerals: CHALCEDONY (quartz) QUARTZYear: 1937Country: Congo (RDC)
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Sample n°5971 : fibrous crust lining geode in white rockMinerals: WAVELLITEYear: 1937Country: Congo (RDC)