The Lumen Stacking Ring. These beautiful little rings sold out in 48 hours when we first launched them & are currently the most popular ring we stock. These hand-finished baguette rings are made to be Mixed, Matched & Stacked, and are equally at home worn casually as they are with evening wear. Made from Cubic Zirconia, they\'re available in white or rainbow stones. - 5mm surface height - Hand-finished stone setting - Trapezoidal Cubic Zirconia stones - Plated brass Gold Ring: 14K Gold & Palladium Alloy Plating. Copper Base Rose Gold Ring: Gold & Palladium Alloy Plating. Copper Base Platinum Ring: Rhodium Plating. Copper Base Nickle Free Get the matching Lumen Earrings here. Get the Sterling Silver version here.