The September birthstone is a rich, deep blue found in the heart of the ocean. Beautiful sapphire CZ jewelry is at your fingertips with the Eves Addiction September birthstone collection. Blue sapphire engagement rings are becoming more and more popular. Get the look for less with the replica Kate Middleton engagement ring or the Princess Diana inspired sapphire CZ collection. September birthstone jewelry is great for everyday wear and adds an extra touch of class to any outfit.