Art Deco Natural Light Yellow 1.02 Carat Old Cushion Cut Center Diamond Platinum Set Diamonds Halo Ring. There are 16 old round cut diamonds in the halo around the center diamond and 1 accent diamond on each shoulder of the ring. Total diamond weight more than 1.40 carats. This is a beautiful Art Deco ring in excellent condition guaranteed to please the new owner. Ring size 7-1/4, the ring measures from top to bottom across the face 11.5 mm, from side to side across the face it measures 11.5 mm, weight 3.1 grams. This is a gorgeous ring guaranteed to please the new owner.