This is an authentic, pre-owned Damiani piece. It may be possible that there is some gentle wear. Platinum Faceted diamonds = approximately 0.03 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.