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
1:04:18
Geology 102: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series
1:03:52
Laboratory-Grown Diamonds: Updates and Identification | GIA Knowledge Sessions Webinar Series
57:58
Color-Change 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
1:18:43
Dr. Nick Steinmetz
1:01:42