Two-phase inclusion in amethyst, Brazil

Twin-crystal of chrysoberyl

Inclusions of hematite in aquamarine, Tanzania

Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

Bubbles and swirls in moldavite (natural glass)

Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

Fire opal, Mexico

Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light

Links

Associazione Italiana Gemmologi

Deutsche Gemmologische Gesellschaft

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

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