All About Fire Obsidian & More Amazing Natural Glass!
19:39
All About Phenomenal Gemstones: Star Sapphire, Labradorite, More!
18:50
Rock Tumbling Rainbow Obsidian!
15:13
All About Fluorite - Alien Eye, Blue John & More Rare Specimens!
10:48
5 Kinds of Glass Made by Nature
31:36
Rock Identification with Willsey: Volcanic Rocks (Tuff, Obsidian, Pumice)
16:55
Jade vs. Simulants - Can You Spot the Difference?
28:57
MOST EXPENSIVE Gemstones Ever Discovered
15:30