This elegant sterling silver necklace features a round-cut blue topaz and sparkling diamonds totaling 1.67 ct. tw. Round-cut Prong-set Diamond = approximately 0.08 ct. tw.; color = I-J; clarity = I1 Faceted round-cut prong-set Blue Topaz = approximately 1.59 ct. tw. Lobster claw clasp closure Material: .925 sterling silver Care Instructions: 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. Imported Pendant drops approximately 1/2in Approximately 16in long with 2in extender Please note: In product titles ct. tw. refers to the total carat weight of all diamonds and/or gemstones combined.