Rock Gold Collection 18ct Yellow Gold Polished Ball Stud Earrings. Simply Elegant... Finish off any look with these 18ct gold ball stud earrings' from our 'Rocks Couture' Collection. Mix and match them with some of our diamond or pearl hoop earrings to style things up for a special occasion or add a similar style necklace & bracelet ffrom our 'Rocks Gold' Collection to complete this look. Diameter: 3mm Finish: Polished Fitting: Post