18-karat gold over .925 sterling silver Prong-set Diamond = approximately 0.05 ct. tw.; color = H-I; clarity = SI2-I1 Citrine gemstones = approximately 3.56 ct. tw. Ring can be re-sized by any professional jeweler; however, if re-sized, it will not be accepted for return 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.