For your special someone born in September, these round blue lab-created sapphire solitaire stud earrings in yellow gold are certain to become a new favourite. Crafted in warm 10K gold Each earring simply glistens with a 5.0mm bright blue lab-created sapphire. Blue sapphire is the traditional birthstone for September and symbolizes truth, sincerity and commitment. These post earrings secure comfortably with friction backs.