About the brand: High-end jewelry steeped in opulence. This is an authentic, pre-loved de Grisogono piece. It's possible that there may be some gentle wear. 18-karat white gold Diamond = approximately 21.70 ct. tw. Approximately 6.28in long Box Tab Insert closure 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.