14-karat yellow gold .925 sterling silver Faceted diamonds = approximately 0.15 ct. tw.; color = G-I; clarity = SI2-I1 Rough Amethyst and Tourmaline gemstones = approximately 18.19 ct. tw. Approximately 16in long Lobster claw clasp 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.