925 sterling silver diamond cut overlapping arch design ring with a faceted solitaire inverted pear blue topaz stone. The stone set in the middle measures 3/16 inch wide at the widest point. It is available in sizes 5, 6, 7, 8, and 9. Although frequently associated with golden yellow as well as blue, it can be found in a variety of colors, including colorless. Measuring 8 on the Mohs scale, topaz is a very hard and durable gemstone. It is one of the birthstones for November.