Yogo Gulch Sapphire

Yogo sapphire - Wikipedia

https://en.wikipedia.org/wiki/Yogo_sapphire

Yogo sapphires are blue sapphires, a colored variety of corundum, found in Montana, primarily in Yogo Gulch (part of the Little Belt Mountains) in Judith Basin County, Montana. Yogo sapphires are typically cornflower blue, a result of trace amounts of iron and titanium. They have high uniform clarity and … See more

Gemological Characterization of Sapphires from Yogo Gulch, …

https://www.gia.edu/gems-gemology/summer-2018-gemological-characterization-of-sapphires-from-yogo-gulch-montana

Yogo Gulch in central Montana is one of the most important gem deposits in the United States. Although very little material has been recovered there in recent years, …

Yogo Sapphires - Montana Gems of Philipsburg

https://montanagems.net/yogo-sapphires/

Yogo sapphires are a variety of corundum found only in the Yogo Gulch area, in Judith Basin county, Montana. This gemstone rich area was …

Sapphire Mines in Montana, A Complete Guide

https://discoveringmontana.com/sapphire-mines/

Luckily, high-quality Sapphires can be found throughout Montana, albeit not quite as valuable as the naturally azure samples of Yogo Gulch. Some of the state’s …

Montana Gem: Specializing in Yogo Sapphires

https://www.montanagem.com/

Yogo is the rarest of all Sapphires. In the late 1880s, Yogo City was like a ghost town. The hundreds of people who had come to the town looking for gold had deserted it. Only a …

Yogo Sapphires | Montana Yogo Sapphire Gemology

https://gemgallery.com/yogo-sapphire-gemology

Yogo Sapphires are the most precious sapphires found in North America. They are considered to be among the finest sapphires in the world. These unique gems come …