1.51 Carat Pink Cushion Sapphire

This 1.51 carat pink sapphire is cut in a cushion shape and has been heat treated, a common practice that enhances color saturation in corundum. The stone is offered as a loose, unset specimen. Pink sapphires derive their color from chromium within the corundum crystal structure, and this example carries a notation of being heated to develop or stabilize its hue. The specifications and sourcing information are documented from Leibish & Co., a vendor specializing in colored gemstones.