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1.68CT PRECISION CUT ELONGATED FANCY CUSHION MONTANA SAPPHIRE, CEYLON CORNFLOWER BLUE, 7.2X6X4.1MM. Mined in Rock Creek, Montana, USA. Visible inclusions and silk in this stone, but the color is so unusual and rare for Montana! It's a cornflower blue, typically found in Ceylon. This sapphire is 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.