This single stud is 1ct and full of sparkle. The diamond is genuine and four prong set in solid 14k yellow gold screw back setting. Item #: ER2251-.15Y Width: 6 mm Weight: 0.5 g Metal: 14k Yellow Gold Diamond Cut: Round Diamond Color: G Diamond Clarity: SI(1)-SI(2) Diamond Carat: 1 Diamond Quantity: 1 Diamond Setting: Prong