Mineralogy Database

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87 samples matching your criteria

  • Sample n°12309 : thick reniform fibro-radial crust
    Minerals: PYROLUSITE
    Year: 1954
    Country: Czech Republic
  • Sample n°12793 : massive block with black needles
    Minerals: PYROLUSITE
    Year: 1972
    Country: South Africa
  • Sample n°12874 : dark grey debris
    Minerals: PYROLUSITE
    Year: 1972
    Country: Congo (RDC)
  • Sample n°12895 : black fibro-radial material
    Minerals: PYROLUSITE
    Year: 1972
    Country: Nigeria
  • Sample n°13012 : locally small crystals with metallic lustre
    Minerals: PYROLUSITE MALACHITE
    Year: 1970
    Country: Congo (RDC)
  • Sample n°13029 : black massive block
    Minerals: PYROLUSITE
    Year:
    Country: Congo (RDC)
  • Sample n°13191 : grey massive block
    Minerals: PYROLUSITE
    Year: 1974
    Country: Burkina Faso
  • Sample n°13199 : large stalactitic block
    Minerals: PYROLUSITE
    Year: 1974
    Country: Congo (RDC)
  • Sample n°13202 : thick dull black coating, nodular
    Minerals: PYROLUSITE
    Year: 1974
    Country: Congo (RDC)
  • Sample n°13263 : concretionary block
    Minerals: PYROLUSITE
    Year: 1975
    Country: Ivory Coast
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