Circa 1920s J.E. Caldwell Retailed Oscar Heyman Art Deco Platinum Ring, Centrally set with a Step cut Square Emerald of approximately 1 Carat, most likely Colombian in origin and having intense fine Green color. Further set with a .33 Carat European cut Diamond on either side and are very fine White in color, further set with smaller European cut diamonds and smaller accent Emeralds. Total Diamond weight 1.10 Carats. Finger size 5 3/4.