Mineralogy Database

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291 samples matching your criteria

  • Sample n°8870 : white powdery blocks (15 cm), as alteration product of tremolite
    Minerals: KAOLINITE
    Year: 1970
    Country: Rwanda
  • Sample n°9059 : various crystals (1-5 cm)
    Minerals: CASSITERITE
    Year: 1962
    Country: Rwanda
  • Sample n°9059.2 : plates (1-7 cm)
    Minerals: COLUMBITE TANTALITE
    Year: 1962
    Country: Rwanda
  • Sample n°9060 : coating with columnar and reticular patterns on muscovitite
    Minerals: CASSITERITE MUSCOVITE
    Year: 1962
    Country: Rwanda
  • Sample n°9061 : beige crystals on saccharoidal quartz
    Minerals: CASSITERITE QUARTZ
    Year: 1962
    Country: Rwanda
  • Sample n°9062 : purple cassiterite in quartz
    Minerals: CASSITERITE
    Year: 1962
    Country: Rwanda
  • Sample n°9064 : mixed broken crystals (1-5 cm)
    Minerals: CASSITERITE COLUMBITE TANTALITE
    Year: 1962
    Country: Rwanda
  • Sample n°9065 : large black crystal
    Minerals: COLUMBITE
    Year: 1962
    Country: Rwanda
  • Sample n°9066 : isolated black crystals (1 cm) and aggregates in vein quartz
    Minerals: COLUMBITE TANTALITE
    Year: 1962
    Country: Rwanda
  • Sample n°9067 : altered pyrite cubes (1 cm)
    Minerals: SCHORL
    Year: 1962
    Country: Rwanda
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