Imagine yourself wearing these cushion-cut lab-created opal solitaire stud earrings, a vibrant addition to your jewelry wardrobe. Fashioned in sterling silver each earring simply glistens with a 7. 0mm cushion-cut iridescent lab-created opal cabochon solitaire. Opal is the traditional birthstone for october and embodies long and lasting love. These post earrings secure comfortably with friction backs.