GRS Gemresearch Documentary: The Mozambique Ruby Collection - A Lifetime Experience
12:02
From Rough to World Record - Estrela de Fura - 55.22 ct
46:04
Inside The Gem Trade: Pigeon’s Blood Ruby | In Search Of Precious Stones | Ep 2/4 | CNA Documentary
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
28:05
PIEDRA PRECIOSA DE ÓPALO DE LIGHTNING RIDGE, AUSTRALIA blackopaldirect.com
52:27
The Emerald of Colombia documentary of Patrick Voillot
17:17
Gemology Tools: What Do I Buy, When?
52:24