Sterling Silver Blue Sapphire Cross Pendant Necklace. 0.19 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 contoured sterling silver cross necklace is a beautiful affirmation of faith. A round cut sapphire at the center of the cross provides a dramatic splash of rich blue color. This September birthstone necklace makes a meaningful gift for a woman of faith.