53:33

Mogok, Myanmar Gem (Ruby, Sapphire) Mining Research Expedition. AIGS.

1:21:09

Mogok: The Legendary Valley Of Rubies

18:54

How much does a one carat ruby cost? - Comprehensive Guide discussing 4Cs plus Origin & Treatment

26:15

MINERAL EXPLORERS | S1 | Ep3 | BRAZIL- MINAS GERAIS

25:56

These 6 Rocks indicate Rare Gems on the Ground

26:56

GRS Gemresearch Documentary: The Mozambique Ruby Collection - A Lifetime Experience

43:06

Ten Exotic and Phenomenal Gemstones

47:06

Uncovering The Flawless Diamond: Inside The Gem Trade | In Search Of Precious Stones | Ep 4/4