Mineralogy Database

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40 samples matching your criteria

  • Sample n°8331 : pink blocks with conchoidal fracture
    Minerals: OPAL
    Year:
    Country: Congo (RDC)
  • Sample n°8801 : white debris (4 cm)
    Minerals: OPAL CHALCEDONY (quartz) QUARTZ
    Year:
    Country: Rwanda
  • Sample n°8996 : white breccious block (7 cm)
    Minerals: OPAL MICA
    Year:
    Country: Rwanda
  • Sample n°9437 : white block with bright plates (12 cm)
    Minerals: OPAL MUSCOVITE
    Year:
    Country: Rwanda
  • Sample n°9531 : grey crystals covered with opal
    Minerals: QUARTZ OPAL
    Year:
    Country: Rwanda
  • Sample n°9537 : grey crystals (2 cm) covered with white opal in block (20 cm)
    Minerals: QUARTZ OPAL
    Year:
    Country: Rwanda
  • Sample n°9538 : clear pyramidal crystals covered with pale green reniform opal (15 cm)
    Minerals: QUARTZ OPAL
    Year:
    Country: Rwanda
  • Sample n°9540.1 : blue geodic block (7 cm)
    Minerals: CHALCEDONY (quartz) OPAL
    Year:
    Country: Rwanda
  • Sample n°9542 : purple block (15 cm), coloured by iron oxides
    Minerals: CHALCEDONY (quartz) OPAL
    Year:
    Country: Rwanda
  • Sample n°9551 : reddish block with conchoidal fracture (22 cm)
    Minerals: CHALCEDONY (quartz) OPAL QUARTZ
    Year:
    Country: Rwanda
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