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2.21CT OVAL TANZANIA SAPPHIRE, COLOR SHIFTING LIGHT MAUVE TO SKY BLUE GREY, 9.20X6.84X4.49MM. Funky, feminine mauve oval sapphire that shifts in color to a soft blue grey, depending on the natural light available. Great clarity, no visible inclusions. Slight abrasions on the girdle. Modern oval brilliant cut. This sapphire has been heated, a permanent treatment for color and clarity.

About Heat Treatments: Some colored gemstones are routinely heated for color and clarity improvement. This is a permanent treatment and typically only involves heat and not chemicals. The treatment mimics what the earth does naturally to gemstones as they reach the surface. If the stone says "Unheated," it is not treated in any way.