18MM Simple Oval Shaped Simulated Black Onyx Stone Clip on Earrings Smooth simulated onyx stone earrings. The clipon design offers convenience. Professionally made and crafted for durability and to simulate the real feel of fine jewelry. Sold by only the best local business, you can ensure you're receiving quality. Arriving in a beautiful gift box(with no charge!) these make a wonderful gift for anyone in your life.