Brilliant Gemstones Sterling Silver With14K Accent Rhodium-Plated Sky Blue Topaz And Peridot 18 Inch Necklace With 2 Inch ExtenderMetal Type Sterling Silver Item Number QG2738 18 Finish Polished Stone Type_1 Sky Blue Topaz Stone Type_2 Peridot Stone Color_1 Blue Stone Color_2 Green Stone Quantity_1 1 Stone Quantity_2 1 Length of Item 20 in Stone Weight_1 3. 73 ctw (total weight) Chain Length 18 in Chain Type Cable Chain Width 1. 2 mm Charm Element Length 19 mm Charm Element Width 7 mm Clasp Connector Lobster Extender Length 2 in Feature Solid Manufacturing Process Casted Stone