By: Marlene Affeld
Brilliant, beautiful and highly prized, the Yogo sapphire is the most precious gemstone mined in the United States and is an official gemstone of Montana. Breathtaking to behold, the Yogo sapphire is found only in Montana.
Yogos are unique among the sapphires of the world. Whereas most of the sapphires found around the world vary greatly in color and quality, the Yogo sapphire’s unusual “corn-flower” blue color is natural (rather than heat treated) and color and clarity are uniformly high. Yogos are nearly flawless. Another unusual quality of Yogo sapphires is that they retain their magnificent brilliance under artificial light. The majority of Yogo sapphires are the signature blue; however, exceptionally beautiful shades of purple are occasionally found.
Continue Reading Rarer Than Diamonds - Montana's Yogo Sapphires
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