This 14-karat gold-plated sterling silver ring features a striking black rutilated quartz solitaire for a modern, organic aesthetic. Black Rutilated Quartz = approximately 2.50 ct. tw. Material: 14-karat Gold-Plated Sterling Silver Imported Black Rutilated Quartz measures 6x12mm; Metal weight is 2.18 grams 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.