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The Microworld of Gemstones | GIA Knowledge Sessions Webinar Series
Geology 101: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series
Geology 102: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series
Tools of the Trade | GIA Knowledge Sessions Webinar Series
Unusual Phenomenal Colored Stones | GIA Knowledge Sessions Webinar Series
Green Gemstones: History, Lore and Gemology | GIA Knowledge Sessions Webinar Series
Highlights from Gems & Gemology: Spring 2021 Issue | GIA Knowledge Sessions Webinar Series
A Comparison of Diamonds and Colored Stones | GIA Knowledge Sessions Webinar Series
Short Takes: Recent Highlights from G&G’s Regular Columns | GIA Knowledge Sessions Webinar Series
Playing the Blues: An Overview of Sapphire Treatment | GIA Knowledge Sessions Webinar Series
Furnaces, Fluxes and Filling: A Review of Ruby Treatment | GIA Knowledge Sessions Webinar Series
Red Gemstones: History, Lore and Gemology | GIA Knowledge Sessions Webinar Series
