Carnelian Stud Earrings These Stud earrings are handmade with Carnelian Cabochons and 925 Sterling Silver. 6mm diameter.(Please see reference photos). The posts are heavy duty and slightly longer than standard (.036/19 ga. x 7/16"L). Two types of 925 Sterling backs are included for preference or just to have a backup pair (Rubber core bullet style and traditional friction catch). Polishing cloth for all jewelry included. Shipped in gift box.