There's nothing quite like the beauty of a natural opal, and while these studs may be tiny, they have some lovely shimmer! These dainty earrings are an easy-to-wear style that are equally beautiful on their own or paired with your favorite dainty hoops or other gold studs. NWT. Specifications Natural opal 18k gold plated Finished with a protective coating Measurements Diameter - 0.1" All measurements are approximate. Each stone is unique, and natural variations will occur. All pics are my own.