Sterling Silver Genuine Amethyst, Blue Topaz, and Peridot Stackable Rings (Set of 3) Set of three sterling silver rings set with peridot, amethyst, and blue topaz stones The natural properties and composition of mined gemstones define the unique beauty of each piece. The image may show slight differences to the actual stone in color and texture. Gemstones may have been treated to improve their appearance or durability and may require special care. Imported