Bubbles and swirls in moldavite (natural glass)

Structure in a healing fissure in topaz from Brazil

Two-phase inclusions in tourmaline from Namibia

Stress fissure («sun spangle») in baltic amber

Two-phase inclusion in amethyst, Brazil

Inclusions of hematite in aquamarine, Tanzania

Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil

Inclusion of apatite in ruby from Tanzania

Links

Associazione Italiana Gemmologi

Deutsche Gemmologische Gesellschaft

GRS GemResearch Swisslab AG

Federation of European Education in Gemmology

Gemological Institute of America GIA

Gemmological Association of Great Britain

Schule für Gestaltung Zürich

The World Jewellery Confederation CIBJO

Zentralverband Schweizerischer Goldschmiede und Uhrenfachgeschäfte VSGU

Gübelin Gem Lab

Gübelin Akademie

Schweizerisches Gemmologisches Institut SSEF

Goldor Magazin für Edelmetalle, Schmuck, Uhren und Edelsteine

Portal der Uhren- und Schmuckbranche

Hong Kong Jewellery & Watch Fair

Sainte-Marie aux Mines

Tucson Gem & Jewelry Show

Sitemap
Impressum
Datenschutz
Nutzungsbedingungen

© SGG/SSG 2022