The Tanzanite Story
43:06
Ten Exotic and Phenomenal Gemstones
47:23
Sunken Treasures (Full Episode) | Drain the Oceans
46:48
Three Precious Gems: Rubies, Emeralds, Sapphires
3:26:26
*Attention* (TRÈS FORT), Laissez l'univers vous envoyer de l'argent, D'énormes sommes d'argent
51:22
Tanzanite from Tanzania documentary of Patrick Voillot
46:10
The Pearl Story
46:36
Hunting Down A Royal Blue Sapphire: Inside The Gem Trade | In Search Of Precious Stones | Ep 3/4
48:58