Mineralogy Database

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16 samples matching your criteria

  • Sample n°4373 : brown and black twinned crystals (3-5 cm)
    Minerals: CASSITERITE
    Year: 1954
    Country: Rwanda
  • Sample n°4699 : thick black prismatic crystal (1 cm) in quartz
    Minerals: SCHORL
    Year: 1954
    Country: Rwanda
  • Sample n°8531 : black anhedral altered crystals in vein quartz
    Minerals: WOLFRAMITE QUARTZ SCORODITE
    Year:
    Country: Rwanda
  • Sample n°8532 : altered black crystals with yellow alteration in vein quartz, with hydrokenoesmoreite (var. ferritungstite)
    Minerals: HYDROKENOELSMOREITE WOLFRAMITE
    Year:
    Country: Rwanda
  • Sample n°9082 : isolated black prismatic crystals (2 cm)
    Minerals: RUTILE
    Year: 1962
    Country: Rwanda
  • Sample n°9232 : brown crystalline masses in clear quartz
    Minerals: CASSITERITE
    Year:
    Country: Rwanda
  • Sample n°9235 : various massive blocks (3-5 cm)
    Minerals: CASSITERITE
    Year:
    Country: Rwanda
  • Sample n°10244 : purplish fragment (8 cm) surrounded by pink muscovite
    Minerals: CASSITERITE
    Year:
    Country: Rwanda
  • Sample n°9222 : grey quartzite with clear quartz veins
    Minerals: QUARTZ
    Year: 1962
    Country: Rwanda
  • Sample n°9225 : partly altered quartzite
    Minerals: QUARTZ
    Year: 1962
    Country: Rwanda
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