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230 samples matching your criteria
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Sample n°979 : blue to black, striatedMinerals: CHALCOPYRITE SPHALERITE GALENA GOETHITE PYRITE RENIERITE TENNANTITE TETRAHEDRITE BORNITE CHALCOCITEYear: 1931Country: Congo (RDC)
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Sample n°980 : small blue metallic fragments, with polished sectionMinerals: CHALCOPYRITE GOETHITE TETRADYMITE GALENA BORNITE CHALCOCITE RENIERITE SILVER SPHALERITE LINNAEITE TENNANTITEYear: 1931Country: Congo (RDC)
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Sample n°996 : ferruginous substrate with veins of copper minerals and quartzMinerals: DIOPTASE HEMATITE QUARTZ CHALCEDONY (quartz) CHRYSOCOLLA GOETHITEYear: 1937Country: Congo (RDC)
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Sample n°997 : network of small veins in ferruginous matrixMinerals: MALACHITE GOETHITEYear: 1937Country: Congo (RDC)
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Sample n°1032 : concretionMinerals: GOETHITEYear: 1938Country: Congo (RDC)
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Sample n°1156 : two small fragments with blue metallic lustre, with polished sectionMinerals: COVELLITE MALACHITE CHALCOCITE GOETHITEYear: 1946Country: Congo (RDC)
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Sample n°1157 : sample with blue to red metallic lustre, oxidised, with polished sectionMinerals: CHALCOCITE CHALCOPYRITE GOETHITE PYRITE BORNITE MALACHITE TENNANTITEYear:Country: Congo (RDC)
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Sample n°1169 : tabular crystals (malachite), fibro-radial aggregates (goethite)Minerals: MALACHITE GOETHITEYear: 1946Country: Congo (RDC)
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Sample n°1226 : small fragment of scoriaceous materialMinerals: MANGANESE OXIDES GOETHITEYear: 1942Country: Congo (RDC)
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Sample n°1235 : poorly developed crystals in geodeMinerals: HEMIMORPHITE GOETHITEYear: 1942Country: Congo (RDC)