Inclusions of hematite in feldspar (sunstone), India
Fire opal, Mexico
Bubbles and swirls in moldavite (natural glass)
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Partially etched diamond crystal
«Red fox agate» from Patagonia, Argentina
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusion of apatite in ruby from Tanzania

Contact

Societé Suisse de Gemmologie
Sekretariat: Willy Bieri

c/o Willy Bieri, Feldgass 34, 6170 Schüpfheim

T. +41 78 696 19 81
E. nfgmmlgch