Mineralogy Database

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237 samples matching your criteria

  • Sample n°10288 : grey debris with rare earth elements
    Minerals: COLUMBITE
    Year: 1963
    Country: Rwanda
  • Sample n°10308 : rounded black crystals (1 cm)
    Minerals: COLUMBITE
    Year:
    Country: Rwanda
  • Sample n°10341 : black crystal (4 cm) in pegmatite
    Minerals: COLUMBITE
    Year:
    Country: Rwanda
  • Sample n°10354 : black tabular crystals (10 cm) in greisen (12 cm)
    Minerals: COLUMBITE
    Year:
    Country: Rwanda
  • Sample n°10369 : concentrate (3 mm)
    Minerals: COLUMBITE
    Year: 1963
    Country: Rwanda
  • Sample n°10378 : white stony block (8 cm) with black columbite crystals (1 cm)
    Minerals: BERYL COLUMBITE
    Year:
    Country: Rwanda
  • Sample n°10380 : black tabular crystals (2 cm)
    Minerals: COLUMBITE
    Year:
    Country: Rwanda
  • Sample n°10388 : black and brown tabular crystals (1-2 cm)
    Minerals: COLUMBITE TANTALITE CASSITERITE
    Year:
    Country: Rwanda
  • Sample n°10391 : black debris (2 cm)
    Minerals: COLUMBITE
    Year:
    Country: Rwanda
  • Sample n°10462 : black coating (5 cm) on vein quartz
    Minerals: COLUMBITE QUARTZ
    Year:
    Country: Rwanda
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