.925 sterling silver Faceted prong-set champagne diamonds = approximately 1.50 ct. tw.; clarity = SI3 Prong-set blue sapphire gemstones = approximately 3.50 ct. tw. Pendant drops approximately 1in Chain approximately 18in 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.