Mineralogy Database

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28 samples matching your criteria

  • Sample n°10350 : block (25 cm) of pyramidal crystals with pale coating
    Minerals: QUARTZ
    Year:
    Country: Rwanda
  • Sample n°10395 : purple pyramidal crystals (3 cm) on quartz block (10 cm)
    Minerals: AMETHYST (quartz) QUARTZ
    Year:
    Country: Rwanda
  • Sample n°10404 : purple crust on block (15 cm)
    Minerals: AMETHYST (quartz)
    Year:
    Country: Rwanda
  • Sample n°9532 : well-developed quartz crystals, covered by thin opal coating
    Minerals: OPAL QUARTZ
    Year:
    Country: Rwanda
  • Sample n°9539 : complex coating
    Minerals: OPAL QUARTZ
    Year:
    Country: Rwanda
  • Sample n°9528 : group of large crystals, with greyish outer layer
    Minerals: QUARTZ
    Year:
    Country: Rwanda
  • Sample n°10349 : large single crystal
    Minerals: QUARTZ
    Year:
    Country: Rwanda
  • Sample n°18535 : crystal with dull exterior
    Minerals: QUARTZ
    Year:
    Country: Rwanda
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