Mineralogy Database

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64 samples matching your criteria

  • Sample n°1051 : block with quartz crystals (amethyst), covered by chalcedony
    Minerals: CHALCEDONY (quartz) AMETHYST (quartz)
    Year: 1938
    Country: Congo (RDC)
  • Sample n°1366 : layer of purple crystals (12 cm)
    Minerals: AMETHYST (quartz)
    Year: 1936
    Country: Congo (RDC)
  • Sample n°1404 : debris of red primatic crystals and quartz (amethyst) (3 cm)
    Minerals: AMETHYST (quartz)
    Year: 1946
    Country: Congo (RDC)
  • Sample n°1436 : geode lined by crystals (1 cm)
    Minerals: AMETHYST (quartz)
    Year:
    Country: Congo (RDC)
  • Sample n°1548 : purple pyramidal crystals (3 and 5 cm)
    Minerals: AMETHYST (quartz)
    Year: 1944
    Country: Congo (RDC)
  • Sample n°1950 : rounded zoned crystal (purple and white)
    Minerals: AMETHYST (quartz)
    Year:
    Country: Congo (RDC)
  • Sample n°1951 : colourless and purple prismatic crystal (15 cm)
    Minerals: AMETHYST (quartz)
    Year:
    Country: Congo (RDC)
  • Sample n°2959 : fragment of vein (10 cm)
    Minerals: AMETHYST (quartz)
    Year: 1928
    Country: Congo (RDC)
  • Sample n°2985 : purplish prismatic crystals (5 cm) and crust of white prismatic crystals (2 cm)
    Minerals: QUARTZ AMETHYST (quartz)
    Year: 1949
    Country: Congo (RDC)
  • Sample n°3031 : various debris, including amethyst
    Minerals: AMETHYST (quartz) QUARTZ
    Year: 1939
    Country: Congo (RDC)
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