Amethyst

Smoky Amethyst Scepter from The Little Gem Mine, Jefferson County, Montana
The term “Little Gem Mine” can refer to several different locations, but the most prominent ones are the Little Gem Amethyst Mine in Jefferson County, Montana, and the Little Gem Mine (Harris Mine) in California’s Tuolumne County. Other mines with “Little Gem” in their name, like the Little Pine Garnet Mine in North Carolina or the Little River Gem Mine in Tennessee, are also possibilities. To find the specific location you’re looking for, you will need to determine the type of gem or mineral and the region you are interested in.
Little Gem Amethyst Mine
Location: Jefferson County, Montana.
Gems: Primarily amethyst.
Details: Known for being in the Boulder Batholith pegmatite district, it is an imposing outcrop about 50 meters long, 20 meters wide, and up to 10 meters thick.

Amethyst (variety of Quartz) specimen from Tennessee, USA.