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13 samples matching your criteria
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Sample n°1311 : brown crystals (1-5 cm)Minerals: CASSITERITEYear: 1934Country: Rwanda
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Sample n°1312 : bundles of prismatic crystals in greisenMinerals: SCHORLYear: 1934Country: Rwanda
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Sample n°859 : layered depositMinerals: AMETHYST (quartz)Year: 1934Country: Rwanda