A FABULOUS Ruby and Diamond Cocktail Ring This ring features a beautiful Cushion cut "Intense Red" Ruby weighing 10.47 carats. The ruby is surrounded by 3.22 carats of white round brilliant cut diamonds with diamond detail on the shank. The ring is certified by Christian Dunaigre of Switzerland. The ruby is heated. Set in platinum with 18k yellow prongs. Currently a size 6, this ring can easily be sized.