This elegant ring features a faceted pear-cut black onyx set in 14-karat gold over .925 sterling silver for a sophisticated, modern look. Black Onyx = approximately 3.02 ct. tw. Material: 14-karat gold over .925 sterling silver Imported Weighs approximately 2.656 grams 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.