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16 samples matching your criteria
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Sample n°241 : desintegrated aggregate of black crystalsMinerals: VIVIANITEYear: 1904Country: Congo (RDC)
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Sample n°242 : concretions with the shape of tubes and branchesMinerals: GOETHITEYear: 1905Country: Congo (RDC)
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Sample n°3363 : white fulgurite debrisMinerals: unspecifiedYear: 1935Country: Congo (RDC)
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Sample n°3611 : reniform concretion in geodeMinerals: CHALCEDONY (quartz) QUARTZYear:Country: Congo (RDC)
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Sample n°7068 : powderMinerals: VIVIANITEYear: 1959Country: Congo (RDC)
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Sample n°8642 : white and beige fragmentsMinerals: AGATE (quartz) CHALCEDONY (quartz)Year: 1949Country: Congo (RDC)
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Sample n°11281 : clayey mass (mountain leather)Minerals: PALYGORSKITE MONTMORILLONITEYear: 1966Country: Congo (RDC)
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Sample n°11708 : mountain leather (50 cm)Minerals: PALYGORSKITE CALCITE MONTMORILLONITEYear: 1968Country: Congo (RDC)
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Sample n°16836 : fine-grained calcite with palygorskite admixture and arkose fragmentsMinerals: PALYGORSKITE CALCITEYear: 2012Country: Congo (RDC)
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Sample n°16840 : weathered arkose with palygorskite veinsMinerals: PALYGORSKITEYear: 2012Country: Congo (RDC)