Mineralogy Database

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190 samples matching your criteria

  • Sample n°1716 : concentrate of octahedral crystals (3 mm)
    Minerals: MAGNETITE
    Year:
    Country: Congo (RDC)
  • Sample n°1717 : black reniform fibro-radial crust
    Minerals: GOETHITE
    Year:
    Country: Congo (RDC)
  • Sample n°1725 : coarse-crystalline rock
    Minerals: CALCITE SIDERITE
    Year:
    Country: Unknown
  • Sample n°1731 : black tabular crystals in vein quartz
    Minerals: ILMENITE
    Year:
    Country: Congo (RDC)
  • Sample n°1732 : spots in quartz
    Minerals: HEMATITE QUARTZ
    Year:
    Country: Congo (RDC)
  • Sample n°1742 : pink block with prominent cleavage (4 cm)
    Minerals: FELDSPAR
    Year:
    Country: Congo (RDC)
  • Sample n°1745 : reniform grey and white crust (chalcedony), olive-coloured powder (mottramite)
    Minerals: CHALCEDONY (quartz) MOTTRAMITE
    Year:
    Country: Congo (RDC)
  • Sample n°1775 : rust-coloured powdery impregnation in pegmatite
    Minerals: HEMATITE VARISCITE
    Year:
    Country: Congo (RDC)
  • Sample n°1786 : several small black flattened crystals
    Minerals: COLUMBITE TANTALITE
    Year:
    Country: Congo (RDC)
  • Sample n°1788 : block of massive ore, altered along surface
    Minerals: ARSENOPYRITE
    Year:
    Country: Congo (RDC)
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