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4 samples matching your criteria
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Sample n°14439 : stacked prismatic crystals with iron oxide coatings on block (6 cm)Minerals: QUARTZYear: 1986Country: Congo (RDC)
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Sample n°19552 : tabular crystalsMinerals: GOETHITEYear: 2021Country: Congo (RDC)
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Sample n°19938 : crystals with iron oxide coatingsMinerals: QUARTZYear: 2022Country: Congo (RDC)
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Sample n°19992 : pseudomorphs after groups of intergrown pyrite crystalsMinerals: GOETHITEYear: 2023Country: Congo (RDC)