Sterling Silver Swiss Blue Topaz Pendant Necklace. 2.03 Carat Total Gemstone Weight. This pendant comes with an 18 inch sterling silver chain as shown. Alternate chain length, weight, or style options are available. This flirty swiss blue topaz fashion necklace feels oh-so fresh. The faceted round gemstone is set in gleaming 925 sterling silver with eye-catching beaded detailing. Your low-key looks need this effortlessly stylish finishing touch.