1 Carat Emerald Cut Diamond Art Deco Engagement Ring Platinum1 Carat Emerald Cut Diamond Art Deco Engagement Ring Platinum. This gorgeous diamond engagement ring is quintessential Art Deco style. The 1. 01 carat emerald cut diamond is held in place by four fishtail prongs that seat the stone slightly above the shoulders with plenty of open space on the sides for light to come in. The shoulders feature bezel set emerald cut accents surrounded by bead set round cut diamonds, which provides a splendid amount of