Sterling Silver Blue Sapphire Curved Bar Pendant Necklace. 0.17 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 on-trend sterling silver necklace features a curved bar of deep blue sapphire stones. Perfect for adding a pop of color to a chic modern ensemble, this September birthstone bar necklace would also make a memorable gift.