Sterling Silver Rhodium-plated Square Cubic Zirconia Halo With 1inch Ext Necklace - 16 Inch - in Sterling Silver - Gift ready jewelry box included - Measures 9.75mm Wide - Charm/Element Width: 9.75 mm - Width of Item: 9.75 mm - Charm/Element Length: 10 mm - Length of Item: 17 in - Chain Length: 16 in - Chain Width: 1.25 mm - Clasp /Connector: Lobster (Fancy) - Finish: Polished - Chain Type: Cable - Feature: Solid - Extender Length: 1 in - Clasp Width (Male end): 5.15 mm - Clasp Width (Female end): 3.85 mm - ::: [ Potential Enhancement Methods: cubic zirconia ] - Synthetic. Some are covered with a product that makes the stone more durable. ::: [ Care and Handling: cubic zirconia ] - Clean with warm soapy water and a soft cloth. :::