Yogo Gulch Montana

Gemological Characterization of Sapphires from Yogo …

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

The sapphire deposit at Yogo Gulch is the only primary deposit in Montana. Figure 3. This suite of rough and cut Yogo sapphires shows the wide range of blue to …

Sapphire Mines in Montana, A Complete Guide

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

Montana’s mining industry today looks a lot different than those early days in Yogo Gulch. This is primarily due to innovative sapphire mining techniques developed in …

Digging Montana's Yogo Sapphires - Distinctly Montana

https://www.distinctlymontana.com/digging-montanas-yogo-sapphires

The major deposits found in Montana are in the Yogo Gulch in central Montana, the Missouri River near Helena, Dry Cottonwood Creek near Deer Lodge, and …

Yogo sapphire - Wikipedia

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

Where to Dig for Sapphires in Montana

https://raregoldnuggets.com/?p=3440

Montana has some of the most abundant sapphire deposits in the world, including the only known hard rock deposits which are …

Yogo Gulch, Montana, Sapphire Mine - mtlilygems.com

http://mtlilygems.com/mineinfo/Yogo%20Gulch/yogogulch,montan.html

Most of the Yogo Gulch sapphire still mined from this deposit never reaches the commercial market. The gem rough is being collected by Sapphire Village residents who have …

Yogo Sapphires - Montana Gems of Philipsburg

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

Yogo sapphires are mined in Montana at Yogo Gulch, 12 miles southwest of Utica, 45 miles west-southwest of Lewistown and east of Great Falls. The yogo sapphire mine site resides inside Judith Basin County and was …

Yogo Sapphire Mining - Montana Gem

https://www.montanagem.com/yogo-sapphire-mining/

Yogo Sapphire Mining - Montana Gem Yogo Sapphire Mining In 1895, the Yogo Sapphire deposit was accidentally discovered by a gold prospector named Jake Hoover. While recovering gold from his sluice, Hoover …

Yogo Gulch, Montana, Sapphire Mine - mtlilygems.com

http://www.mtlilygems.com/mineinfo/Yogo%20Gulch/yogogulch,montaa.html

Yogo Gulch, Montana, Sapphire Mine Locale Shown above left is the south-western portion of the Yogo Gulch sapphire mine as it appeared in 1985. The sapphire deposit is actually a lamproite dike that intruded a …

Montana Gem: Specializing in Yogo Sapphires

https://www.montanagem.com/

The Yogo sapphires we sell are hand mined, untreated, and sustainably sourced from our claims in Yogo Gulch, Montana. Family Owned and Operated Since 1978 Featured …