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1.60CT SQUARE RADIANT CUT MADAGASCAR SAPPHIRE, TEAL BLUE GREEN, 6.43X6.35X4.86. This sapphire is a stunning bluish teal color with reallystriking coloring. There is some natural silk present in this stone. This sapphire is presumed heated, apermanent 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.