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Mine Attractions In Great Falls

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Great Falls is a town in and the county seat of Cascade County, Montana, United States. The 2017 census estimate put the population at 58,638. The population was 58,505 at the 2010 census. It is the principal city of the Great Falls, Montana Metropolitan Statistical Area, which encompasses all of Cascade County and has a population of 82,278. Great Falls was the largest city in Montana from 1950 to 1970, when Billings surpassed it. Great Falls remained the second largest city in Montana until 2000, when it was passed by Missoula. Since then Great Falls has been the third largest city in the state.Great Falls takes its name from the series of five water...
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Mine Attractions In Great Falls

  • 1. Montana Blue Jewel Mine Helena
    Yogo sapphires are a variety of corundum found only in Yogo Gulch, part of the Little Belt Mountains in Judith Basin County, Montana, United States, on land once inhabited by the Piegan Blackfeet people. Yogos are typically cornflower blue, a result of trace amounts of iron and titanium. They have high uniform clarity and maintain their brilliance under artificial light. Because Yogo sapphires occur within a vertically dipping resistive igneous dike, mining efforts have been sporadic and rarely profitable. It is estimated that at least 28 million carats of Yogos are still in the ground. Jewelry containing Yogos was given to First Ladies Florence Harding and Bess Truman; in addition, many gems were sold in Europe, though promoters' claims that Yogos are in the crown jewels of England or the...
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