Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Colour zoning in ruby from Mong-Shu, Burma
Structure in a healing fissure in topaz from Brazil
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Dendrites in agate
Partially etched diamond crystal
Inclusions of hematite in feldspar (sunstone), India

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