Mineralogy Database

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87 samples matching your criteria

  • Sample n°13568 : black botryoidal blocks (7-10 cm)
    Minerals: PYROLUSITE
    Year: 1977
    Country: Ukraine
  • Sample n°13874 : earthy hexagonal prismatic crystal (12 cm) with black spots
    Minerals: BERYL PYROLUSITE
    Year: 1980
    Country: Portugal
  • Sample n°13930 : pink-purple block
    Minerals: VARISCITE PYROLUSITE
    Year: 1982
    Country: Congo (RDC)
  • Sample n°13931 : manganite crystals (cf. specimen RGM 13382)
    Minerals: PYROLUSITE MANGANITE
    Year: 1982
    Country: Congo (RDC)
  • Sample n°13933 : coral-like
    Minerals: PYROLUSITE
    Year: 1982
    Country: Congo (RDC)
  • Sample n°14475 : dendrites on banded iron-rich sandstone (age +/- 2250 Ma)
    Minerals: PYROLUSITE
    Year:
    Country: South Africa
  • Sample n°17799 : coated fragments
    Minerals: CASSITERITE PYROLUSITE
    Year: 2017
    Country: Congo (RDC)
  • Sample n°17925 : stalactitic group
    Minerals: PYROLUSITE
    Year: 2017
    Country: Congo (RDC)
  • Sample n°17931 : stalactitic deposit
    Minerals: PYROLUSITE
    Year: 2017
    Country: Congo (RDC)
  • Sample n°17939 : crust with stalactitic aspect
    Minerals: PYROLUSITE
    Year: 2017
    Country: Congo (RDC)
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