Sterling Silver Rhodium-plated Blue Cubic Zirconia and Larimar With 2in Extension Necklace - 16 Inch - 3.8 Grams In Sterling Silver in Plated Metal - - Gift ready jewelry box included - Measures 12.5mm Wide - Charm/Element Width: 12.5 mm - Width of Item: 12.5 mm - Charm/Element Length: 28.6 mm - Length of Item: 18 in - Chain Length: 16 in - Chain Width: 1.1 mm - Clasp /Connector: Spring Ring - Finish: Polished - Extender Length: 2 in - ::: [ 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. ::: ::: ::: [ Care and Handling: larimar ] - Clean with warm soapy water and a soft brush or cloth. :::