A luminous opal nestled in a heart-shaped bezel setting. A sweetly understated stud perfect for the helix, lobe, and tragus piercings. Sold as a single. SIZE & MATERIALS Composition: 14k yellow gold, opal Measurements: stud: 4mm, threaded back post thickness: 16 gauge (1.2mm), p ost length: 6.5mm Closure: internally threaded heart back Read about piercing jewelry and closure systems .