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Moonstone

A member of the feldspar family of minerals, moonstone is usually cut in a domed shape (‘en cabochon’) to show off its unique visual property, adularescence. Adularescence, also sometimes called schiller, is a sheen seen from certain angles that almost appears to illuminate the stone, and is caused by light interacting with the intricately layered structure in which moonstone forms. Reminiscent of moonlight playing upon water, adularescence gives moonstones a poetic and ghostly quality quite unlike any other gemstone.