Rough Diamonds: Natural Crystal Shapes & Surface Features | GIA Knowledge Sessions Webinar Series
1:03:33
Emerald Sources: The Grass is Greener on the Other Side | GIA Knowledge Sessions Webinar Series
1:01:42
Identifying Mineral Inclusions in Diamonds | GIA Knowledge Sessions Webinar Series
1:05:05
Playing the Blues: An Overview of Sapphire Treatment | GIA Knowledge Sessions Webinar Series
58:48
Understanding the Origin of Natural Diamonds | GIA Knowledge Sessions Webinar Series
22:18
These Crystals can be Real Diamonds - See how to Identify
59:04
Diamond Exploration & Mining | GIA Knowledge Sessions Webinar Series
1:04:54
Furnaces, Fluxes and Filling: A Review of Ruby Treatment | GIA Knowledge Sessions Webinar Series
1:04:18