Mineralogy Database

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402 samples matching your criteria

  • Sample n°9536 : crystals in geode in quartzite
    Minerals: QUARTZ
    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°9543 : white and purplish crystal aggregates (8 cm)
    Minerals: AMETHYST (quartz)
    Year:
    Country: Rwanda
  • Sample n°9547 : clear prismatic crystal with striated crystal faces (30 cm)
    Minerals: QUARTZ CHALCEDONY (quartz)
    Year:
    Country: Rwanda
  • Sample n°9548 : yellowish clear prismatic crystals (2-10 cm)
    Minerals: QUARTZ
    Year:
    Country: Rwanda
  • Sample n°9551 : reddish block with conchoidal fracture (22 cm)
    Minerals: CHALCEDONY (quartz) OPAL QUARTZ
    Year:
    Country: Rwanda
  • Sample n°9552 : pale green prismatic crystals (1-3 cm) in altered greisen
    Minerals: APATITE
    Year:
    Country: Rwanda
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