Three Stone Halo Engagement Ring in PlatinumThree Stone Halo Engagement Ring in Platinum. This diamond engagement ring features three (3) primary stones weighing 3. 27 carats surrounded by a halo of diamonds weighing . 41 carats. The three primary stones are bezel set with fine milgrain detailing. The edges of the halo are also adorned with the same milgrain work. The basket contains open work in the shape of hearts and the shoulders hold a row of three (3) more diamonds bead set in a row. This