Incredible Antique Diamond Engagement Ring Art DecoIncredible antique diamond engagement ring Art Deco. This engagement ring was created in the Art Deco era and is made with platinum. The layers of different cuts of diamonds in this ring create a dramatic wall of white sparkles. The center diamond is an old European cut weighing . 67 carats. The center diamond is bordered on each side by three (3) baguette cut diamonds that are graduated in size. There is another layer of single cut diamonds that