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"Yogo sapphire" is the preferred term for gems found in the Yogo Gulch, whereas "Montana sapphire" generally refers to gems found in other Montana locations. More gem-quality sapphires are produced in Montana than anywhere else in North America. Sapphires were first discovered in Montana in 1865, in alluvium along the Missouri River. Finds in ...
An uncut, rough yellow sapphire found at the Spokane Sapphire Mine near Helena, Montana. Sapphire is one of the two gem-varieties of corundum, the other being ruby (defined as corundum in a shade of red). Although blue is the best-known sapphire color, it occurs in other colors, including gray and black, and also can be colorless.
The sapphires, called Yogo sapphires as they are mined near Yogo Creek, occur in a formation three miles (4.8 km) long and eight feet (2.4 m) across. [ 1 ] The mountains are named for a butte in the range, Belt Butte, itself named for a band of white rock which encircles it.
Utica is an unincorporated community in west-central Judith Basin County, Montana, United States. It is approximately 40 miles (64 km) from Lewistown [3] at the intersections of Pig Eye Road, Montana Route 239 (the "Utica highway"), and Montana Route 541. Yogo sapphires were found near Utica in the mid-1890s. [4] Judith River Ranger Station is ...
Leaders of states in the U.S. which have significant mineral deposits often create a state mineral, rock, stone or gemstone to promote interest in their natural resources, history, tourism, etc. Not every state has an official state mineral, rock, stone and/or gemstone, however.
Jan. 21—A sign above Montana History teacher Kris Schreiner's classroom alerts Kalispell Middle School eighth graders that they are entering Alder Gulch to mine for gold and garnets. Alder Gulch ...
The Sapphire Mountains are a range of mountains located in southwestern Montana in the northwestern United States.From a point near the Clark Fork River and the city of Missoula, they run in a southerly direction for a distance of approximately 60 miles (100 km), making up much of the border between Ravalli County (to the west) and Granite County.
Rock Creek is a 52-mile (84 km) river in Missoula and Granite County, Montana. Rock Creek is a tributary of the Clark Fork river. The river's headwaters are in Lolo National Forest near Phillipsburg, Montana. The river roughly parallels the Sapphire Mountains and enters the Clark Fork of the Columbia River near Clinton, Montana.
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