Mineralogy Database

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95 samples matching your criteria

  • Sample n°9659 : black lamellae on white feldspar (18 cm)
    Minerals: BIOTITE MICROCLINE
    Year:
    Country: Rwanda
  • Sample n°9835 : black plates (6 cm) in carbonatite gangue material
    Minerals: BIOTITE
    Year: 1962
    Country: Congo (RDC)
  • Sample n°9951 : grey lava (15 cm) with white phenocrysts
    Minerals: BIOTITE TITANITE
    Year:
    Country: Rwanda
  • Sample n°9960 : plate-shaped crystals (2-5 cm)
    Minerals: BIOTITE
    Year: 1963
    Country: Germany
  • Sample n°10178 : largely crystalline block (12 cm)
    Minerals: NEPHELINE ALBITE BIOTITE
    Year: 1964
    Country: Canada
  • Sample n°10695 : plates (1 cm)
    Minerals: BIOTITE
    Year:
    Country: Rwanda
  • Sample n°10867 : biotitite
    Minerals: BIOTITE
    Year: 1958
    Country: Congo (RDC)
  • Sample n°11170 : black crystalline volcanic bomb (6 cm)
    Minerals: HORNBLENDE BIOTITE
    Year: 1966
    Country: Germany
  • Sample n°11173 : black crystals and plates (1-5 cm)
    Minerals: AUGITE BIOTITE HORNBLENDE
    Year: 1966
    Country: Germany
  • Sample n°11363 : plate (15 cm)
    Minerals: BIOTITE
    Year: 1967
    Country: Congo (RDC)
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