Gem-A Live: Understanding Gemstone Species and Varieties
51:31
Gem-A Live: Introduction to Diamonds
1:12:13
Geology 101: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series
17:17
Gemology Tools: What Do I Buy, When?
1:12:00
Gem-A Live: Man-made Stones Explained
13:17
PRECIOUS Gemstones vs. SEMI-PRECIOUS Gemstones: What do they mean? How do we use them? 2022
44:07
Cheap and Simple Tips to help identify rough Gemstones , Sapphires, Ruby's, garnets 🔥 💎 🔥 💎!!!
1:26:21
Gem-A Live: Lead Glass Filled Rubies and Sapphires
20:23