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6.60CTRADIANT CUT MADAGASCAR SAPPHIRE, DEEP GREEN TEAL WITH FLASHES OF ROYAL BLUE, 12.70X8.55X6.16MM, HEATED. Elongated stone with deep saturation of color. This stone will appear darker blue indoors and then show pops of green teal in outdoor, natural lighting. Light, natural silk in this stone not visible from a normal distance. It has been 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.