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Sapphires: From Ceylon to Ethiopia | GIA Knowledge Sessions Webinar Series
Playing the Blues: An Overview of Sapphire Treatment | GIA Knowledge Sessions Webinar Series
The Sapphires of Montana | GIA Knowledge Sessions Webinar Series
Geology 101: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series
116th Gemstone Gathering | Traditional vs. Non Traditional Color Terms Applied to Sapphires
Highlights from Gems & Gemology: Spring 2021 Issue | GIA Knowledge Sessions Webinar Series
Geology 102: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series
Understanding Jadeite | 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
Rubies: Connecting Sources, Treatment and Science | GIA Knowledge Sessions Webinar Series
Furnaces, Fluxes and Filling: A Review of Ruby Treatment | GIA Knowledge Sessions Webinar Series
