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  4 samples matching your criteria
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        Sample n°789 : white clayey blockMinerals: KAOLINITEYear:Country: Congo (RDC)
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        Sample n°1717 : black reniform fibro-radial crustMinerals: GOETHITEYear:Country: Congo (RDC)
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        Sample n°3439 : clear prismatic crystals (2 cm)Minerals: QUARTZYear:Country: Congo (RDC)
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        Sample n°4228 : crust of elongated orange-brown crystals, partly as radial aggregates (5 cm)Minerals: CALCITEYear:Country: Congo (RDC)