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An uncut/rough yellow sapphire found at the Spokane Sapphire Mine near Helena, Montana "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. [18] More gem-quality sapphires are produced in Montana than anywhere else in North America. [18 ...
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.
The most lucrative vein was in the Liverpool Mine, which produced over a million dollars worth of silver ore during its height of production. [3] A map of the Lump Gulch Mining District is located in the Montana Historical Society collection. [2] In 2020, the Lump Gulch Fire started in the Lump Gulch area. The result of a downed power line ...
The most important mines, including the Hummingbird, Slim Jim, Schabert, Baker Group, and Three Sisters, are all located along the divide between Confederate Gulch and White Creek, principally on Miller Mountain. Lode mines produced only $100,000 in gold, while the placers of Confederate Gulch yielded this sum one hundred and fifty times over.
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.
Philipsburg is a town in and the county seat of Granite County, Montana, United States. [3] The population was 841 at the 2020 census. [4] The town was named after the famous mining engineer Philip Deidesheimer, who designed and supervised the construction of the ore smelter around which the town originally formed. [5]
Mines in Montana (10 P) Mining communities in Montana (15 P) Mining museums in Montana (1 P) Pages in category "Mining in Montana" The following 15 pages are in this ...
The dam was located about seven miles east of Missoula, Montana, at the confluence of the Blackfoot River with the Clark Fork. Built in 1908 by copper mining tycoon William A. Clark, it was meant to supply hydroelectricity to his sawmills in nearby Bonner, Montana. Clark's sawmills supplied the giant timbers used to shore up the walls of the ...