European Oval Peridot & Diamond Platinum Ring . The ring in prong set center with a natural green peridot measuring 14 x 10 mm estimated 5 plus carats. The stone is framed with genuine quality brilliant cut diamonds . Diamond weight estimated .65ct . The ring measures 15 x 20 mm and weighs 10.6 grams platinum . The ring is a finger size of 8 1/2 and can be custom sized by our in house jeweler.