Classic sterling silver .925 stud earrings set with stunning Neptune Garden Topaz gemstones. These gorgeous topazes are mid blue with hints of turquoise and pinks. The Mystic Topaz is an enhanced, or treated, gemstone. To create mystic topaz, natural, colourless topazes are coated with a thin layer of titanium or similar metal. The coating is only microns thick and is applied to the stone's pavilion, the underside angled portion that typically forms the bulk of the gem. The application process is protected by strict patents that limit the amount of mystic topaz available in the general market.