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Twin-crystal of chrysoberyl
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Structure in a healing fissure in topaz from Brazil
Colour zoning in ruby from Mong-Shu, Burma
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Inclusion of apatite in ruby from Tanzania

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Associazione Italiana Gemmologi
Deutsche Gemmologische Gesellschaft
GRS GemResearch Swisslab AG
Federation of European Education in Gemmology
Gemological Institute of America GIA
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Schule für Gestaltung Zürich
 
 
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Zentralverband Schweizerischer Goldschmiede und Uhrenfachgeschäfte VSGU
 
 
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© SGG/SSG 2022

 

Our sponsors for 2022:

 
 
 
 
System Eickhorst
 
 
FAERBER
 
 
FERRARI
 
 
System Eickhorst
 
 
GRS
 
 
GÜBELIN
 
 
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Wild & Petsch
 
 
 
 
Christian Dunaigre
 
 
 
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