Gem-A Live: Gems of the UK
54:38
Gem A Live: In Discussion with the Editor of The Journal of Gemmology
1:11:32
Gem-A Live: Understanding Gemstone Species and Varieties
1:09:46
Pebble Spotting with Clive Mitchell
1:12:00
Gem-A Live: Man-made Stones Explained
1:01:37
Gem-A Live: Titanium Diffusion in Sapphire
33:25
Mudlarking & Beachcombing in Scotland! Hunting Golden Agates & Sea Glass Gems
1:11:00
Gem-A Live: Fluorescence
16:18