Art Deco Diamond Engagement Ring in Platinum .45 CaratsArt Deco Diamond Engagement Ring in Platinum . 45 Carats. This lovely Art Deco platinum and diamond engagement ring features a . 45 carat old European cut diamond flush set at the center. The center diamond is bead set and accented with decorative corner embellishments creating a square appearance. The side diamonds are bead set into the platinum setting with divided sections added to the Art Deco design. The ring also features wonderful hand