9ct Gold Princess Cut 3 mm CZ Stud EarringsCZ Stud Earrings These 9ct gold stud earrings are each set with a 3 mm cubic zirconia stone. The stone is fashioned into a princess cut, a square shape with sharp, uncut corners that creates a clean, geometric profile. The setting is crafted from 9ct gold, an alloy containing 37. 5% pure gold, which provides a durable and warm toned foundation for each sparkling stone.