Episode 43: Lapis Lazuli
20:12
Episode 44: Ametrine
5:19
The Rarest Pigment in the World | Colour the Spectrum of Science | BBC Earth Science
23:07
Episode 40: Turquoise: Real, Simulated, Fakes, & Wannabes
21:25
Hitting the 100K carat quota for aquamarine | S2:E4
13:55
Lapis Lazuli | the King of Gems
20:14
$6000 investment - The best cut ever - Rare Harlequin Black Opal
11:43
Lapis Lazuli History and Lore | Lapis Stone Properties and Spiritual Benefits
20:30