This unique antique piece was handcrafted sometime during the Art Deco design period ( 1920-1940 ). The filigree setting is 18k white gold and features a 0.61 carat old mine cut diamond. The diamond grades approximately SI2 in clarity. The setting is particularly remarkable, featuring fine filigree in the shape of an iris on either side of the shank. The setting also features beautiful hand engravings and fine milgrain accents. This ring is currently a size 7 & 1/4.