Mineralogy Database

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87 samples matching your criteria

  • Sample n°4676 : white clay on Mn oxides
    Minerals: KAOLINITE PYROLUSITE
    Year: 1954
    Country: Congo (RDC)
  • Sample n°5476 : brown earthy blocks
    Minerals: PYROLUSITE
    Year: 1954
    Country: Congo (RDC)
  • Sample n°6493 : black gravel with red crust
    Minerals: PYROLUSITE
    Year:
    Country: Congo (RDC)
  • Sample n°6495 : black ore
    Minerals: PYROLUSITE
    Year:
    Country: Congo (RDC)
  • Sample n°6708 : black block (7 cm) with geodes containing fibrous material
    Minerals: PYROLUSITE
    Year: 1954
    Country: USSR
  • Sample n°6709 : earthy black block (6 cm)
    Minerals: PYROLUSITE
    Year: 1954
    Country: Portugal
  • Sample n°6710 : block with black fibrous concretionary layers
    Minerals: PYROLUSITE
    Year: 1954
    Country: USA
  • Sample n°6711 : sawn fibrous block (5 cm)
    Minerals: PYROLUSITE
    Year: 1954
    Country: India
  • Sample n°6712 : microgranular metallic block (4 cm)
    Minerals: PYROLUSITE
    Year: 1954
    Country: Germany
  • Sample n°6749 : stalactitic (7 cm)
    Minerals: PYROLUSITE
    Year: 1954
    Country: India
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