A pair of delicately set, tiny Opal crystal stud earrings. Gorgeous when worn alone or alongside your favorite studs. Opal is a beautiful gemstone with a subtle metallic rainbow-like gemstone. It's known to inspire love, hope, luck, and happiness in one's life. Measures in at a tiny 3 mm. Our materials make for an amazing, high quality, seamless, jewelry piece with longevity. Our earrings are brass plated with 24k gold, 18k rose gold, or rhodium and finished with a protective coating.