Peter Lyckberg: “Gem Pegmatites: An Update on Recent Production”
20:19
Raquel Alonso-Perez: “Multidisciplinary Approach to Emerald Sources”
59:04
Diamond Exploration & Mining | GIA Knowledge Sessions Webinar Series
1:05:05
Playing the Blues: An Overview of Sapphire Treatment | GIA Knowledge Sessions Webinar Series
55:58
Gem Crystal Pegmatite Pocket Formation and Survival
32:11
Barbara Dutrow (keynote): “Tourmaline and Geologic Evolution”
46:48
Three Precious Gems: Rubies, Emeralds, Sapphires
1:03:33
Emerald Sources: The Grass is Greener on the Other Side | GIA Knowledge Sessions Webinar Series
14:46