About the brand: Timeless beauty and superior craftsmanship - a jewelry icon. This is an authentic, pre-loved Tiffany & Co. piece. It's possible that there may be some gentle wear. 18-karat white gold Faceted Round Brilliant-cut Diamond = approximately 0.80 ct. tw.; color = FG; clarity = VS 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.