Mineralogy Database

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87 samples matching your criteria

  • Sample n°10728 : layer in garnet-bearing rock
    Minerals: PYROLUSITE
    Year: 1965
    Country: Congo (RDC)
  • Sample n°10733 : veins in rock
    Minerals: PYROLUSITE
    Year: 1965
    Country: Congo (RDC)
  • Sample n°10744 : massive, with some manganite
    Minerals: PYROLUSITE
    Year: 1965
    Country: Congo (RDC)
  • Sample n°10746 : massive
    Minerals: PYROLUSITE
    Year: 1965
    Country: Congo (RDC)
  • Sample n°11074 : black manganese ore, partly with thick fibrous coating with fine surface texture
    Minerals: PYROLUSITE
    Year: 1966
    Country: Saint Helena (UK)
  • Sample n°11167.2 : geodes with black nodules in baryte as gangue material
    Minerals: PYROLUSITE BARYTE
    Year: 1966
    Country: Germany
  • Sample n°11167.3 : black metallic botryoidal block (10 cm)
    Minerals: PYROLUSITE
    Year: 1966
    Country: Germany
  • Sample n°11361 : fibro-radial pyrolusite layers in black mass
    Minerals: PYROLUSITE MANGANESE OXIDES
    Year:
    Country: Burkina Faso
  • Sample n°11994 : core samples of ore deposit
    Minerals: PYROLUSITE
    Year: 1969
    Country: Congo (RDC)
  • Sample n°12225 : massive black pyrolusite on calcite (13 cm)
    Minerals: PYROLUSITE CALCITE
    Year: 1969
    Country: Czech Republic
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