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1.39CT DEEP BLUE TEAL ELONGATED CUSHION CUT MONTANA SAPPHIRE, 8.07X5.34X3.58MM.This sapphire is cut in an elongated cushion cut, faceted similar to an old mine cushion cut diamond. It is a deep ocean blue color. The sapphire has some visible silk inclusions, common for stones from this area.
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.