Sterling Silver Created Opal with Blue and White Topaz Accent Ring, Size 7 Sterling silver ring with prong-set opal and topaz accent stones polish finish gemstones may have been treated to improve their appearance or durability and may require special care. 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. Great for everyday wear. Imported