https://www.eatonturnerjewelry.com/
Fine Jewelry & Yogo Sapphires | Eaton Turner Jewelry | Montana Wedding Rings | Helena, Montana
Eaton Turner Jewelry offers unique, timeless, and elegant jewelry designed to elevate your every day life. From bespoke engagement rings to Montana inspired...
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https://www.gia.edu/CN/gems-gemology/summer-2018-gemological-characterization-of-sapphires-from-yogo-gulch-montana
Gemological Characterization of Sapphires from Yogo Gulch, Montana
A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.
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