GIA Certified .85 Art Deco Vintage Diamond Engagement RingGIA Certified . 85 Art Deco Vintage Diamond Engagement Ring. The old European cut diamond is bezel set and bordered by refinished milgrain detail, giving the stone a wonderful border. The basket is finished with gorgeous engraving, and a small, single cut diamond on each side. The center diamond is accented by four more additional diamonds, adding a bit of sparkle from every angle. The open split shank gives the ring a light air and the milgrain and