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24 samples matching your criteria
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Sample n°1366 : layer of purple crystals (12 cm)Minerals: AMETHYST (quartz)Year: 1936Country: Congo (RDC)
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Sample n°1368 : purple crystals on feldsparbearing rockMinerals: FLUORITE FELDSPARYear: 1936Country: Congo (RDC)
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Sample n°1387 : black spots (5 mm) on yellow quartzMinerals: CASSITERITE QUARTZYear: 1936Country: Congo (RDC)
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Sample n°1388 : cassiterite crystal (1 cm) on saccharoidal quartzMinerals: CASSITERITEYear: 1936Country: Congo (RDC)
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Sample n°1389 : black twinned crystal (6 cm)Minerals: CASSITERITEYear: 1936Country: Congo (RDC)
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Sample n°1390 : debrisMinerals: CASSITERITEYear: 1936Country: Congo (RDC)
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Sample n°1393 : cassiterite crystals (0.1-3 cm) in micaschistMinerals: CASSITERITE QUARTZYear: 1936Country: Congo (RDC)
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Sample n°1400 : discontinuous vein in vein quartzMinerals: CASSITERITE QUARTZYear: 1938Country: Congo (RDC)
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Sample n°1401 : hexagonal plates in pegmatiteMinerals: MUSCOVITEYear: 1943Country: Unknown
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Sample n°1403 : crystal (cm) in vein quartzMinerals: RUTILE QUARTZYear: 1939Country: Congo (RDC)