This is an authentic, pre-owned Graff piece. It's possible that there may be some gentle wear. 18-karat white gold Round-cut Prong-set Diamond = approximately 4.30 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 colour and durability. Some of these treatments may not be permanent, and may require special care. Colour: grey