2.11 Old European Cut Diamond Engagement Ring in Platinum.  This stunning 2.11 carat Old European cut diamond engagement ring is finished in platinum and comes from the Art Deco period. The primary stone is slightly warmer with an N color, and is flanked on each shoulder by thin baguettes. This special vintage ring fits inside a wonderful size range that is large enough to have a tremendous presence, but retains a classic and clean appearance.