Emerald Sources: The Grass is Greener on the Other Side | GIA Knowledge Sessions Webinar Series
51:15
Natural Yellow & Orange Diamonds | GIA Knowledge Sessions Webinar Series
1:05:21
Sapphires: From Ceylon to Ethiopia | GIA Knowledge Sessions Webinar Series
55:47
Green Gemstones: History, Lore and Gemology | GIA Knowledge Sessions Webinar Series
1:04:18
Geology 102: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series
59:02
The Sapphires of Montana | GIA Knowledge Sessions Webinar Series
15:14
How To Identify Gold In Rocks
6:00:02
Sahalé - Djiin (6 hours)
14:12