About the brand: Unmistakable luxurious jewelry. This is an authentic, pre-loved Stephen Webster piece. It's possible that there may be some gentle wear. 18-karat white gold Diamond = approximately 0.60 ct. tw. Gemstone(s): Crystal 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.