Mineralogy Database

Search |  About the mineralogy database |  Contact

28 samples matching your criteria

  • 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°9543 : white and purplish crystal aggregates (8 cm)
    Minerals: AMETHYST (quartz)
    Year:
    Country: Rwanda
  • Sample n°9725 : block of pyramidal crystals (7 cm), smoky quartz
    Minerals: QUARTZ
    Year:
    Country: Rwanda
  • Sample n°9727 : blocks (12-20 cm) of grey pyramidal crystals
    Minerals: QUARTZ
    Year:
    Country: Rwanda
  • Sample n°9728 : block (30 cm) of white pyramidal crystals
    Minerals: QUARTZ CHALCEDONY (quartz) OPAL
    Year:
    Country: Rwanda
  • Sample n°9729 : grey quartz aggregates (25 cm)
    Minerals: QUARTZ
    Year:
    Country: Rwanda
  • Sample n°9730 : honey-coloured crystalline plate
    Minerals: QUARTZ
    Year:
    Country: Rwanda
Previous page