Mineralogy Database

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94 samples matching your criteria

  • Sample n°13517 : pale green prismatic crystal (1 cm)
    Minerals: DIOPSIDE BIOTITE CALCITE
    Year: 1978
    Country: Madagascar
  • Sample n°13868 : geode with large black wolframite crystals and green apatite crystals
    Minerals: APATITE QUARTZ WOLFRAMITE BIOTITE CALCITE PYRITE
    Year: 1980
    Country: Portugal
  • Sample n°13897 : black crystals composed of stacked lamellae (4 cm)
    Minerals: BIOTITE ANHYDRITE CALCITE PYRITE
    Year: 1981
    Country: Madagascar
  • Sample n°14414 : yellow block (10 cm), and mixed block with yellow crystals (cancrinite) and black platelets (biotite)
    Minerals: CANCRINITE BIOTITE
    Year: 1986
    Country: Cameroon
  • Sample n°9679 : coarse-grained blocks with prominent large biotite crystals
    Minerals: ALBITE BIOTITE QUARTZ MUSCOVITE
    Year: 1962
    Country: Rwanda
  • Sample n°8649 : gneiss with prominent banding
    Minerals: BIOTITE FELDSPAR QUARTZ
    Year: 1960
    Country: Congo (RDC)
  • Sample n°16198 : plate-shaped fragments
    Minerals: BIOTITE
    Year:
    Country: Congo (RDC)
  • Sample n°16567 : well-developed zircon crystals in biotite-rich matrix
    Minerals: ZIRCON BIOTITE
    Year:
    Country: Congo (RDC)
  • Sample n°17624 : clusters of elongated tourmaline crystals in biotitite matrix
    Minerals: BIOTITE TOURMALINE
    Year: 2017
    Country: Congo (RDC)
  • Sample n°17638 : biotite crystals in schist matrix
    Minerals: BIOTITE
    Year: 2017
    Country: Congo (RDC)
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