18K Stainless Steel Waterproof Tarnish-Free Basic Stud Classic 6 pair Rhinestone Stud Earrings. This set features 3 pairs of classic rhinestone stud and heart, butterfly stud earrings. Made from high-quality stainless steel with a luxurious 18K gold finish, these earrings feature a stunning bubble triangular hoop that adds depth and dimension to your look.