This Tiffany & Co semi-mount three-stone engagement ring setting is a size 6.5 (US), made of 950 platinum, and weighs 3.70 DWT (approx. 5.75 grams). Set in 18Kt Yellow Gold prongs, are 2 ruby side stones weighing a total of 1.20 Carats. It accommodates an Oval cut center stone measuring approx. 7.80 mm in length and 5.80 mm in width; an approx. 1.15 carats.