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319 samples matching your criteria
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Sample n°1664 : ferruginous substrate with black coatingsMinerals: GOETHITE MANGANESE OXIDESYear:Country: Congo (RDC)
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Sample n°1665 : black needles (4 cm) in pegmatiteMinerals: TOURMALINEYear:Country: Congo (RDC)
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Sample n°1668 : concretionary block (15 cm)Minerals: CALCITEYear:Country: Congo (RDC)
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Sample n°1669 : encrustation around spring (7 cm)Minerals: CALCITEYear:Country: Congo (RDC)
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Sample n°1671 : crystals (1 cm)Minerals: AUGITEYear:Country: Congo (RDC)
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Sample n°1672 : star-shaped aggregates of fibres (2 cm) in lavaMinerals: ZEOLITEYear:Country: Congo (RDC)
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Sample n°1673 : reworked crystal (12 cm)Minerals: CASSITERITEYear:Country: Congo (RDC)
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Sample n°1674 : brown crystals (2 cm)Minerals: CASSITERITEYear:Country: Congo (RDC)
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Sample n°1675 : needles (mm) in micaschistMinerals: TOURMALINEYear:Country: Congo (RDC)
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Sample n°1676 : crystals (2 cm) on bitumenMinerals: QUARTZYear:Country: Congo (RDC)