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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. [18] More gem-quality sapphires are produced in Montana than anywhere else in North America. [18] Montana sapphires come in a variety of colors, though rubies are rare. [16] [18] [23]
Chile Bar Slate company quarry, off of highway CA193 next to the American River near Placerville, California; Limestone quarry near Auburn, California of the Mountain Quarries Company of San Francisco, a subsidiary of Pacific Portland Cement Company, near confluence of the North Fork and the Middle Fork of the American River.
Dry Cottonwood Creek is a creek in Deer Lodge County, Montana. Approximately 10 miles (16 km) long, it flows northwest out of the southern reaches of the Boulder Mountains into the Clark Fork river near Deer Lodge, Montana. Sapphires are found along this creek. [2]
Showdown is a ski area located within the mountains located off US Highway 89 which splits the mountains in half connecting White Sulphur Springs and Belt, MT. The highest point in the Little Belt Range is Big Baldy Mountain at 9,467 feet (2,886 m). The Little Belts have been mined for silver since the 1880s, and for sapphire since 1896. [1]
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.
This is a list of U.S. state soils.A state soil is a soil that has special significance to a particular state.Each state in the United States has selected a state soil, twenty of which have been legislatively established.
The geology of Montana includes thick sequences of Paleozoic, Mesozoic and Cenozoic sedimentary rocks overlying ancient Archean and Proterozoic crystalline basement rock. . Eastern Montana has considerable oil and gas resources, while the uplifted Rocky Mountains in the west, which resulted from the Laramide orogeny and other tectonic events have locations with met
It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors. The only color corundum stone that the term sapphire is not used for is red, which is called a ruby. [1] Pink colored corundum may be either classified as ruby or sapphire depending on locale.
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