Send a special birthday wish with our September Birthstone necklace. This sleek and elegant design is created using 925 Sterling Silver. With a Royal Blue Cubic Zirconia that represents the September birthstone - Sapphire, set into a Bezel setting and sits on a Silver disc.. Sapphire is the traditional birthstone for September babies and is said to be symbolic of Sincerity and Truth. Our Birthstone collection each come with an individual birthstone card that will give you the meaning and symbolism of your personal stone.. Create an extra special gift set with matching earrings and bracelet also available.