A piece from our iconic classics bridal collection - timeless designs crafted for a lifetime. This marquise-cut lab-grown diamond engagement ring in platinum opens a new chapter in your endless love story. Platinum 4 ct. Marquise-cut lab-grown diamond round lab-grown diamond shank certified lab-grown diamonds; f color/vs2 clarity includes certification card 4-1/2 cts. T. W. Of lab-grown diamonds