Designed to make the moment unforgettable, this lab-grown diamond engagement ring brings together an oval center stone, a sparkling halo flanked in marquise-cut stones, and a polished 14k white gold setting. 14k white gold 1 ct. Round-shaped lab-grown diamond center stone framed in a lab-grown diamond halo marquise-shaped lab-grown diamond side accents 1 3/4 ct. T. W. Certified of lab-grown diamonds; f color/vs2 clarity includes certification card