This platinum engagement ring mounting features a center 4-prong mounting that accommodates one .75-ct. (5.8mm, approx.) round faceted stone. The shank is set with 14 1-pt. round diamonds (SI1 clarity/G, H color; 14 pts. TW) in shared 4-prong mountings. 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.