For your special someone born in October, these round iridescent lab-created opal 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 iridescent lab-created opal cabochon. Opal is the traditional birthstone for October and embodies long and lasting love. These post earrings secure comfortably with friction backs.