Sapphires From Montana - A Historical, Geological, and Gemological Overview
48:58
The Gemstone Journey
59:02
The Sapphires of Montana | GIA Knowledge Sessions Webinar Series
43:06
Ten Exotic and Phenomenal Gemstones
29:33
Gems of the Americas (THROWBACK NOSTALGIC) #throwback #nostalgia
1:05:21
Sapphires: From Ceylon to Ethiopia | GIA Knowledge Sessions Webinar Series
49:36
The Diamond Story
14:36
Sapphire Mining Adventure at Gem Mountain, Montana!
20:06