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85 samples matching your criteria
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Sample n°3304 : anhedral crystals (1-3 cm)Minerals: CASSITERITEYear: 1931Country: Rwanda
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Sample n°4322.2 : small crystalMinerals: RUTILEYear: 1954Country: Rwanda
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Sample n°4363 : layer of grey crystals (4 cm)Minerals: CASSITERITEYear: 1954Country: Rwanda
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Sample n°4364 : brown twinned crystals ('bec d'étain') (3 cm) in quartz veinMinerals: CASSITERITEYear: 1954Country: Rwanda
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Sample n°4365 : intergrowth of large crystals, glassy lustreMinerals: CASSITERITEYear: 1954Country: Rwanda
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Sample n°4366 : aggregate of brown crystals (1 cm) on vein quartzMinerals: CASSITERITEYear: 1954Country: Rwanda
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Sample n°4448 : dull black crystals (1-4 cm)Minerals: COLUMBITE TANTALITEYear: 1954Country: Rwanda
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Sample n°4604 : pentagonal dodecahedron (1 cm)Minerals: GARNETYear: 1954Country: Rwanda
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Sample n°6554 : joined stalactites (22 cm)Minerals: CALCITEYear:Country: Rwanda
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Sample n°8560 : stony debris (5 cm)Minerals: BERYLYear:Country: Rwanda