Platinum Art Deco Engagement Ring w/ Cushion Cut Diamond.  This vintage Art Deco ring features a beautiful 1.12 carat cushion cut diamond and is set in platinum. The center stone is set with split prongs and completes an attractive gentle profile. There is nice open work on the sides below the basket and the shoulders which allows plenty of light into the 1 carat diamond. Such a lovely ring that will be cherished for a lifetime!