Structure in a healing fissure in topaz from Brazil
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Spinel crystal in dolomite marble, Burma
Colour zoning in ruby from Mong-Shu, Burma
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of hematite in feldspar (sunstone), India
Bubbles and swirls in moldavite (natural glass)
Stress fissure («sun spangle») in baltic amber

Objectives

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