Understanding the Origin of Natural Diamonds | GIA Knowledge Sessions Webinar Series
53:11
Unusual Phenomenal Colored Stones | GIA Knowledge Sessions Webinar Series
57:16
A Glimmer of Hope: The World's Most Famous Blue Diamond | GIA Knowledge Sessions Webinar Series
18:37
Found a diamond? Identify, Test, and Verify Real Diamonds - Tips and tricks for testing
1:40:40
⌛ [David Elbaz] L’histoire de l’univers racontée par la lumière
1:29:11
Amazonie, les civilisations oubliées de la forêt | ARTE
1:05:05
Playing the Blues: An Overview of Sapphire Treatment | GIA Knowledge Sessions Webinar Series
45:43
The Unique Story of Natural Diamond | GIA Knowledge Sessions Webinar Series
1:01:42