Fire opal, Mexico
«Red fox agate» from Patagonia, Argentina
Dendrites in agate
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Twin-crystal of chrysoberyl
Dumortierite in rock crystal, Brazil, polarised light
Stress fissure («sun spangle») in baltic amber
Fluid inclusions in quartz with bituminous daughter minerals, China


The Swiss Gemmological Society has the following objectives:

  • To promote the gemmological knowledge of its members
  • To extend this knowledge through annual training and to pass on the benefits thereof to the gemstone and pearl trades in the industry
  • Protect the interest of the purchasing public
  • Maintain ethical business practices, combat unfair competition and comply with the international guidelines of the diamond, gemstone and pearl trades