An opal gleams from its molten bezel setting in this petite stud. Sold as a single. * This piece comes with a 6.5mm back post. Additional posts with different lengths can be purchased as add-ons. SIZE & MATERIALS Composition: 14k yellow gold, opal Measurements: Stud: 4mm, 16 gauge Closure: threaded heart-shaped ball back Read about piercing jewelry and closure systems Collections Stud Earrings - Gold Jewelry - 14k Gold Jewelry