Mineralogy Database

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40 samples matching your criteria

  • Sample n°9532 : well-developed quartz crystals, covered by thin opal coating
    Minerals: OPAL QUARTZ
    Year:
    Country: Rwanda
  • Sample n°16333 : whitish to greenish-grey massive nodules
    Minerals: OPAL
    Year: 2010
    Country: Tanzania
  • Sample n°1065 : greenish coating
    Minerals: OPAL
    Year: 1936
    Country: Congo (RDC)
  • Sample n°16215 : coatings of vesicles
    Minerals: OPAL CALCITE
    Year:
    Country: Rwanda
  • Sample n°9429 : white coatings
    Minerals: OPAL
    Year: 1961
    Country: Rwanda
  • Sample n°9539 : complex coating
    Minerals: OPAL QUARTZ
    Year:
    Country: Rwanda
  • Sample n°19599 : selection of minerals from Katanga, exclusive of copper-bearing species, in wooden collection case
    Minerals: CALCITE CARROLLITE CASSITERITE CERUSSITE DOLOMITE GALENA GOETHITE GOLD GYPSUM HEMATITE HEMIMORPHITE HETEROGENITE MOLYBDENITE MONAZITE QUARTZ SMITHSONITE SPHALERITE VAESITE OPAL
    Year: 2021
    Country: Congo (RDC)
  • Sample n°19801 : pinkish brown, with bright lustre, conchoidal fracture
    Minerals: OPAL
    Year: 2022
    Country: Mexico
  • Sample n°20003 : coatings with xyloidal aspect
    Minerals: OPAL
    Year: 2023
    Country: Congo (RDC)
  • Sample n°20044 : pervasive impregnation, with various colours
    Minerals: OPAL
    Year: 2023
    Country: Mexico
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