Petite Quad Diamond Stud Earrings by CaratLane. Diamond stud earrings for the modern woman. These petite diamond studs feature a polished finish on our signature metal. Each of these earrings is set in 18 KT Yellow Gold(1.080 g) with diamonds (0.11 ct ,IJ-SI) can be worn beautifully in pairs or solo statement pieces. These earrings are perfect for everyday wear and will go with just about everything in your jewellery box.