.88 Vintage Art Deco Diamond Engagement Ring in Platinum. Full of designer appeal, this Art Deco engagement ring features an .88 carat old European cut diamond diamond accents finished in platinum. The exquisite center diamond is bead set on a hexagon mounting. Twelve (12) .025 carat diamonds are bead set in structured channels, surrounding the center stone. Two (2) .015 carat accent diamonds decorate the shoulders of the band.