This elegant bar necklace features a rectangle-cut blue topaz and prong-set diamonds in .925 sterling silver with a total weight of 0.57 ct. tw. Faceted rectangle-cut prong-set diamond = approximately 0.02 ct. tw.; color = I-J; clarity = I1 Faceted rectangle-cut blue topaz = approximately 0.55 ct. tw. Lobster claw clasp closure Material: .925 sterling silver Imported Pendant drops approximately 1/4in Approximately 16in long with 2in extender 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.