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Inclusions of gilalite aggregates in rock crystal from Brazil
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Fire opal, Mexico
Two-phase inclusion in amethyst, Brazil
Dendrites in agate
Partially etched diamond crystal
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers

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
 
 
GemGenève
Hong Kong Jewellery & Watch Fair
Sainte-Marie aux Mines
Tucson Gem & Jewelry Show
 
 
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