Condition: New Cubic Size: 6mm Claw, Frame, Post: 18K Yellow Gold Marking: K18 Catch: Silicone and 18K W-catch These four-prong stud earrings are very popular, with the cubic zirconia sparkling beautifully. Also, because they are 18K yellow gold, they will not peel or discolor like gold plating, and they will not cause allergic reactions. (※ Some people with allergies to 18K gold are excluded.)