Partially etched diamond crystal
Two-phase inclusion in amethyst, Brazil
Bubbles and swirls in moldavite (natural glass)
Inclusions of hematite in aquamarine, Tanzania
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Colour zoning in ruby from Mong-Shu, Burma
Natural etching structure on a crystal face of diamond (trigons), polarised light
Stress fissure («sun spangle») in baltic amber

Kontakt

Schweizerische Gemmologische Gesellschaft
Sekretariat: Rébecca Michelot
c/o BDO AG, Hodlerstrasse 5, 3001 Bern

T. +41 79 668 6989
E. nfgmmlgch