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Schweizerische Gemmologische Gesellschaft
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Structure in a healing fissure in topaz from Brazil
Bubbles and swirls in moldavite (natural glass)
Agate from Reichweiler, Germany
Inclusion of apatite in ruby from Tanzania
Fire opal, Mexico
Agate from Anzi, Maroc
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Dumortierite in rock crystal, Brazil, polarised light

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  • Gemmology
    • Knowledge
    • Diamonds
    • Terminology
    • The 4 C's
    • Precious stones
    • Colours
    • Pearls
    • Cultured pearls
    • Treatments
  • About us
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    • Commitee
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    • Become a member
  • Current
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