"Moonstone is so-named for its luminous appearance, enhanced by a unique, ghostly sheen visible from certain angles. This ghostly sheen, which can be white, blue or a light yellow, is known as ‘adularescence’, and is caused by light reflecting through the stone’s intricately layered crystal structure. The stone is almost always cut as a cabochon to show off this effect to its fullest, and this example is no exception. However, this Vintage Ring is unusual for being heart-shaped, and set within a millegrain bordered halo of antique circular-cut diamonds, making it a particularly sweet example of an antique jewel which translates beautifully to modern wear."