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17 samples matching your criteria
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Sample n°12535 : sample with zircon as black veins and dendritic material, white calcite, siderite crystals (radioactive sample)Minerals: ZIRCON CALCITE SIDERITEYear: 1970Country: Burundi
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Sample n°12588 : cluster of brown and red cubes (1-12 cm)Minerals: HEMATITEYear: 1971Country: Burundi
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Sample n°12596 : black prismatic crystals (12 cm) with triangular cross-sections, and crystal aggregateMinerals: SCHORLYear: 1971Country: Burundi
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Sample n°12597 : banded grey-white and pink-white blocks (8 and 15 cm)Minerals: CHALCEDONY (quartz)Year: 1971Country: Burundi
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Sample n°13394 : debris of specular material (10 cm)Minerals: HEMATITEYear: 1976Country: Burundi
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Sample n°17165 : bright green coating on nickel-bearing lateriteMinerals: NEPOUITEYear:Country: Burundi
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Sample n°19579 : thick crustMinerals: CRYPTOMELANEYear:Country: Rwanda