This platinum ring mounting features a center 4-prong mounting that holds one 1-ct. (6.5mm, approx.) round faceted gemstone. Its tapered shank is accented with eight semi-mounted 3-pt. round diamonds (SI1 clarity/G, H color; 24 pts. TW) in shared 4-prong mountings, giving it a classic yet eye-catching look. Cut a seat in the prongs to accommodate your stone, then burnish the prongs over the stone to secure it in place.