Art Deco 1.10 Solitaire Diamond Engagement Ring in Platinum.  This Art Deco engagement ring features a 1.10 carat Old European cut center diamond and .18 carats of accent diamonds finished in platinum. The center diamond has a very light warm hue and is set in six platinum prongs. Six (6) .03 carat Old European cut accent diamonds are set in shared prongs on the shoulders of the ring. From the profile, a decorative openwork gallery and basket mounting give this engagement ring a vintage, elegant flair.