Mineralogy Database

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103 samples matching your criteria

  • Sample n°1794 : vein quartz with bright black wolframite
    Minerals: WOLFRAMITE QUARTZ
    Year:
    Country: Rwanda
  • Sample n°1795 : geode with black crystals (mm) in white quartz (8 cm)
    Minerals: WOLFRAMITE QUARTZ
    Year:
    Country: Rwanda
  • Sample n°1868 : tetragonal pyramidal crystals and part of prismatic crystal (2-5 cm)
    Minerals: FERBERITE
    Year:
    Country: Rwanda
  • Sample n°1869 : black massive scoriaceous material in vein quartz (4 and 8 cm)
    Minerals: WOLFRAMITE QUARTZ
    Year:
    Country: Rwanda
  • Sample n°1870 : black crystals (2 cm) in grey vein quartz
    Minerals: FERBERITE QUARTZ
    Year:
    Country: Rwanda
  • Sample n°1875 : black anhedral crystals in quartz (2 and 4 cm)
    Minerals: FERBERITE
    Year:
    Country: Rwanda
  • Sample n°1885 : altered black crystal in vein quartz debris (5 cm), with hydrokenoesmoreite (var. ferritungstite)
    Minerals: FERBERITE HYDROKENOELSMOREITE ANTHOINITE QUARTZ
    Year:
    Country: Rwanda
  • Sample n°1887 : black crystals (1 cm)
    Minerals: AUGITE
    Year:
    Country: Rwanda
  • Sample n°3350 : black pyramidal crystals with square cross-section (1-2 cm)
    Minerals: FERBERITE
    Year: 1953
    Country: Rwanda
  • Sample n°3351 : black pyramidal crystal with square cross-section (6 cm)
    Minerals: FERBERITE
    Year: 1953
    Country: Rwanda
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