Unusual Phenomenal Colored Stones | GIA Knowledge Sessions Webinar Series
1:05:05
Playing the Blues: An Overview of Sapphire Treatment | GIA Knowledge Sessions Webinar Series
19:39
All About Phenomenal Gemstones: Star Sapphire, Labradorite, More!
1:10:32
The Microworld of Gemstones | GIA Knowledge Sessions Webinar Series
59:02
The Sapphires of Montana | GIA Knowledge Sessions Webinar Series
57:46
Tools of the Trade | GIA Knowledge Sessions Webinar Series
1:12:20
Italian Opera - Best of Puccini
1:11:32
Gem-A Live: Understanding Gemstone Species and Varieties
1:05:21