Mineralogy Database

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102 samples matching your criteria

  • Sample n°1959 : black plates (2 cm)
    Minerals: COLUMBITE
    Year:
    Country: Rwanda
  • Sample n°2004 : black crystals in large block of greisen
    Minerals: TANTALITE
    Year:
    Country: Rwanda
  • Sample n°2006 : black plates (4 cm) in block of greisen (12 cm)
    Minerals: TANTALITE QUARTZ
    Year:
    Country: Rwanda
  • Sample n°2007 : black tabular crystals (2 cm) in micaceous quartz
    Minerals: TANTALITE QUARTZ
    Year:
    Country: Rwanda
  • Sample n°2487 : black plates (2 cm) and needles in altered greisen (16 cm)
    Minerals: TANTALITE
    Year:
    Country: Rwanda
  • Sample n°3371 : rust-coloured black block (5 cm)
    Minerals: COLUMBITE TANTALITE
    Year: 1953
    Country: Rwanda
  • Sample n°4204 : pegmatite blocks (15 cm)
    Minerals: MUSCOVITE
    Year: 1954
    Country: Rwanda
  • Sample n°4371 : black twinned crystal (6 cm) in quartz
    Minerals: CASSITERITE
    Year: 1954
    Country: Rwanda
  • Sample n°4441 : black plates (1 cm)
    Minerals: TANTALITE
    Year: 1954
    Country: Rwanda
  • Sample n°4444 : black debris
    Minerals: COLUMBITE TANTALITE
    Year: 1954
    Country: Rwanda
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