You are viewing a very nice quality Diamond ring made in the Art Deco period of the 1930's in Platinum. The ring measures 19 mm or 3/4" up the finger by 17 mm across. It is set with fine quality Diamonds weighing just over 1/2 carat in total. The center stone is a marquise cut Diamond weighing 1/4 carat. The stones are fine with a grade of VS-2; H. The ring is marked: 900 Plat 100 Irid, Certified. The ring is a size 5 1/2 and can be re-sized. The ring weighs 4.4 grams.