Ritani for Forevermark Diamond Halo Platinum Engagement Ring Mounting 1RZ4418.  This engagement ring mounting is made of polished platinum and the setting with hold a 1.50 carat round-cut diamond.  The center diamond is framed by a halo of round-cut white diamonds with a diamond accent set in the undergallery.  Total diamond weight without the center stone is 0.17 carats.