4/13/2023 0 Comments Yogo sapphire![]() ![]() Due to their high resistance to weathering and extremely hard construction, sapphires can be found in both sedimentary rocks and sedimentary deposits. Corundum is considered one of the hardest known natural substances aside from diamonds. Sapphires are made of corundum, also known as aluminum oxide (Al2O3). They are created underground from shifts in pressure and heat. Sapphires mined today were formed around 150 to 200 million years ago. Rock Creek sapphires, Missouri River sapphires and Yogo sapphires all are valuable types acquired through sapphire mining operations. Montana sapphires can be found in three main locations: Rock Creek near Philipsburg, the Missouri River near Helena, and Yogo Gulch. Of course, a Montana sapphire's monetary value is based on its color, cut, clarity, and carat weight. They are also valuable due to the way that they are ethically sourced and mined. Their diverse array of colors and striking brilliance are not the only qualities that make Montana sapphires so popular. ![]() The sapphire is considered one of the “Big Three” precious colored gemstones, alongside emeralds and rubies. with significant production of gem-quality sapphires, these stunning stones have become a highly sought-after commodity. Sapphires have been mined for more than 100 years in Montana. ![]()
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