CZ Blue Imitation Sapphire Front Back Stud Earrings Jacket Silver (Blue). Blue jewelry is all the rage this season and our blue sapphire glass earrings are a stunning and hot hue that will lend a regal touch to any ensemble. These September birthstone drop earrings are glam and feminine. Each round gorgeous blue glass stone earring measures 6mm and is surrounded by pave set CZs and is made in an up to the minute design. The 5mm blue stone at the top adds some extra sparkle. Easy to wear, these4 versatile piece can be worn as studs without the ear jacket, making them a perfect fit to any style. These affordable sapphire glass earrings are made from rhodium plated brass to resist tarnish and keep their shiny look. The post with friction back will keep these fashion jewelry earrings fitting very comfortably. September birthstone earrings are a perfect way to add a pop of color to a neutral outfit. While we aim to supply accurate product information, it is sourced by manufacturers, suppliers and marketplace sellers, and has not been provided by Overstock.