2022- Yogold U.S.A. Corporation launches, more information coming soon!!!
EDITORIAL, Yogo Sapphire Production: Part 1 of 2, Reviving the American Dream- by Olga Gonzalez
History, Legend, and Lore of Sapphires from Yogo Gulch, Montana presented by Dr. Aaron Palke
Oct 8, 2020 - The Sapphires of Montana | GIA Knowledge Sessions Webinar Series
GIA 2019 Article on the YOGO Sapphire
Gems & Gemology, 2018 GIA Publication featuring the YOGO Sapphire
