Mineralogy Database

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41 samples matching your criteria

  • Sample n°9728 : block (30 cm) of white pyramidal crystals
    Minerals: QUARTZ CHALCEDONY (quartz) OPAL
    Year:
    Country: Rwanda
  • Sample n°10832 : enclosed in breccia
    Minerals: OPAL
    Year: 1961
    Country: South Africa
  • Sample n°11085 : block with cmplex green veins and coatings
    Minerals: OPAL COPPER
    Year: 1966
    Country: Italy
  • Sample n°11797 : bluish geode in andeistic rock (12 cm)
    Minerals: OPAL
    Year: 1968
    Country: Slovakia
  • Sample n°12002 : light vitreous aggregate (2 cm), var. hyalite
    Minerals: OPAL
    Year: 1954
    Country: Germany
  • Sample n°12049 : colourless to yellowish glass-like opal on substrate, bright green fluorescence
    Minerals: OPAL
    Year:
    Country: Rwanda
  • Sample n°12792 : block with black manganese oxides and brown opal
    Minerals: MANGANESE OXIDES OPAL
    Year: 1972
    Country: South Africa
  • Sample n°12906 : yellow lamellae
    Minerals: OPAL
    Year:
    Country: Burkina Faso
  • Sample n°14205 : green and blue oval polished stone (0.26 g)
    Minerals: OPAL
    Year: 1983
    Country: Australia
  • Sample n°15784 : massive, with waxy lustre (var. hyalite)
    Minerals: OPAL
    Year:
    Country: USA
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