Peter Lyckberg: “Gem Pegmatites: An Update on Recent Production”
20:19
Raquel Alonso-Perez: “Multidisciplinary Approach to Emerald Sources”
1:05:21
Sapphires: From Ceylon to Ethiopia | GIA Knowledge Sessions Webinar Series
55:58
Gem Crystal Pegmatite Pocket Formation and Survival
59:04
Diamond Exploration & Mining | GIA Knowledge Sessions Webinar Series
22:47
Martin Steinbach: “An Overview of Asteriated Gems”
1:07:41
A Look at Kimberlites: The Volcanoes that Carry Diamonds | GIA Knowledge Sessions Webinar Series
32:10
How granitic melts strengthen the crust - resolving the "pegmatite paradox"
1:05:12