Structure in a healing fissure in topaz from Brazil

Agate from Anzi, Maroc

Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers

Bubbles and swirls in moldavite (natural glass)

Fire opal, Mexico

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Fluid inclusions in quartz with bituminous daughter minerals, China

Spinel crystal in dolomite marble, Burma

Liens

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

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