Condition: New Cubic Size: 2mm 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 won't peel or discolor like gold plating, and they won't cause allergic reactions. (※Excluding those with allergies to 18K gold.)