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1.36CT ASSCHER CUT MONTANA SAPPHIRE, LIGHT DENIM BLUE, 5.5X5.15MM. Mined in Montana, USAthis sapphire has great clarity and sparkle for a sapphire fro the region! Beautiful light denim blue. This sapphire is presumed to be 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.