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111 samples matching your criteria
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Sample n°12722 : bright prismatic crystals (5 cm) in quartzMinerals: WOLFRAMITEYear: 1972Country: Congo (RDC)
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Sample n°12723 : black tabular crystals (10 cm) in vein quartzMinerals: WOLFRAMITEYear: 1972Country: Congo (RDC)
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Sample n°12748 : black wolframite on vein quartzMinerals: WOLFRAMITEYear: 1972Country: Congo (RDC)
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Sample n°12751 : black and brown crystals on sacchariodal quartzMinerals: WOLFRAMITE CASSITERITEYear: 1972Country: Congo (RDC)
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Sample n°12755 : brown concentrate (1 cm)Minerals: WOLFRAMITEYear: 1971Country: Congo (RDC)
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Sample n°12760 : geodic block with black wolframite crystals and brown cassiterite crystalsMinerals: WOLFRAMITE CASSITERITEYear: 1972Country: Congo (RDC)
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Sample n°12811 : black crystals (1 cm) disseminated in rockMinerals: WOLFRAMITEYear: 1972Country: South Africa
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Sample n°12890 : brown crystals in ferruginous matrixMinerals: WOLFRAMITE GOETHITEYear: 1972Country: Congo (RDC)
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Sample n°12943 : black crystalline blocks (6-8 cm)Minerals: WOLFRAMITEYear: 1972Country: Rwanda
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Sample n°12951 : black block with white crustMinerals: WOLFRAMITE KAOLINITEYear: 1972Country: Rwanda