2.5 microns yellow gold over .925 sterling silver Gemstone(s): Swiss Blue Topaz & White Topaz = approximately 3.51 ct. tw. The Ring Size Guide(https://s3.amazonaws.com/more-info/guides/ring-size) Ring cannot be re-sized It is customary to treat most gemstones to achieve enhanced color and durability. Some of these treatments may not be permanent, and may require special care. Please note: In product titles ct. tw. refers to the total carat weight of all diamonds and/or gemstones combined.
