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1.00CT SQUARE RADIANT MADAGASCAR SAPPHIRE, OCEAN BLUE, 5.51X5.26X3.50MM. This stone is a stunning blue teal sapphire, with a grayish green undertone. This stone is eye clean and has small inclusions that are visible through magnification. It is heat treated, 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.