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111 samples matching your criteria
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Sample n°4563 : rounded black crystals (1 cm)Minerals: WOLFRAMITEYear: 1954Country: Congo (RDC)
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Sample n°4564 : tabular crystal (7 cm) on quartzMinerals: WOLFRAMITE QUARTZYear: 1954Country: Congo (RDC)
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Sample n°4566 : black crystal (5 cm) in quartzMinerals: WOLFRAMITEYear: 1954Country: Rwanda
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Sample n°4567 : bright brown crystals, mixed with grey cassiteriteMinerals: CASSITERITE WOLFRAMITE QUARTZYear: 1954Country: Congo (RDC)
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Sample n°4568 : bright black rounded crystal (5 cm)Minerals: WOLFRAMITEYear: 1954Country: Congo (RDC)
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Sample n°4812 : black mass and layers in quartzMinerals: WOLFRAMITEYear: 1954Country: United Kingdom
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Sample n°5452 : black and brown massive material in vein quartz, with polished sectionMinerals: CASSITERITE WOLFRAMITE QUARTZYear: 1955Country: Congo (RDC)
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Sample n°5952 : lead-bearing altered grey debrisMinerals: WOLFRAMITEYear: 1958Country: Congo (RDC)
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Sample n°6825 : black ore with bright prismatic and tabular crystalsMinerals: WOLFRAMITEYear: 1954Country: Portugal
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Sample n°7931 : black crystals with bright cleavage planes in brecciaMinerals: WOLFRAMITEYear:Country: Congo (RDC)