This classically styled 14-karat white gold engagement ring mounting features a 4-prong mounting that holds one .50-ct. (5mm, approx.) round faceted stone. Pre-notched prongs provide a professional start to stone-setting with perfectly level stone seats already cut into each prong. Set your stone into the prongs to check the fit. If necessary, adjust the seat to best accommodate your stone. To secure the stone in place, burnish the prongs over the stone.