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43 samples matching your criteria
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Sample n°2463 : massive, with cleavageMinerals: HEMATITEYear: 1938Country: Congo (Congo-Brazzaville)
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Sample n°2464 : stalagmiteMinerals: CALCITEYear: 1938Country: Congo (Congo-Brazzaville)
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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°2878 : cave pearlMinerals: CALCITEYear: 1950Country: Congo (RDC)
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Sample n°3021 : bright crystals in geodeMinerals: QUARTZYear: 1937Country: Congo (RDC)
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Sample n°3022 : geode (7 cm)Minerals: QUARTZYear: 1937Country: Angola
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Sample n°3024 : massive block (3 cm)Minerals: AZURITEYear: 1938Country: Congo (RDC)
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Sample n°3098 : plate of bladed crystalsMinerals: GYPSUMYear: 1938Country: Angola
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Sample n°3529 : tabular crystal (1 cm)Minerals: CALCITEYear:Country: Congo (Congo-Brazzaville)
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Sample n°3609 : round aggregates of crystals in geodeMinerals: CALCITEYear: 1938Country: Congo (RDC)