Bubbles and swirls in moldavite (natural glass)
Fire opal, Mexico
Colour zoning in ruby from Mong-Shu, Burma
Two-phase inclusion in amethyst, Brazil
Spinel crystal in dolomite marble, Burma
Natural etching structure on a crystal face of diamond (trigons), polarised light
Partially etched diamond crystal
Inclusions of fossil plant debris in opal from Wollo, Ethiopia


Societé Suisse de Gemmologie
Sekretariat: Iva Pavic

c/o Iva Pavic, Heerenschürlistrasse 4, 8051 Zürich

T. +41 78 720 98 54
E. nfgmmlgch