Understanding the Origin of Natural Diamonds | GIA Knowledge Sessions Webinar Series
53:11
Unusual Phenomenal Colored Stones | GIA Knowledge Sessions Webinar Series
59:04
Diamond Exploration & Mining | GIA Knowledge Sessions Webinar Series
45:43
The Unique Story of Natural Diamond | GIA Knowledge Sessions Webinar Series
1:09:47
The History of Diamond Cutting and Polishing Technology | GIA Knowledge Sessions Webinar Series
1:05:12
Rough Diamonds: Natural Crystal Shapes & Surface Features | GIA Knowledge Sessions Webinar Series
57:16
A Glimmer of Hope: The World's Most Famous Blue Diamond | GIA Knowledge Sessions Webinar Series
57:24
Diamond Color Treatment and Its Identification | GIA Knowledge Sessions Webinar Series
1:12:13