.35 Art Deco Engagement Ring in 18k White Gold. This Art Deco engagement ring is composed of a .35ct Old European cut diamond with single cut accent diamonds in an interesting 18k white gold band. Forming a unique, “buckle” shape, with a square setting and two strap-like shoulders, this one-of-a-kind vintage ring is one of our new favorites. When looking at the profile, the embellishments in the white gold band are boxy and architectural, very characteristic of Art Deco era jewelry designs. A special engagement ring for your bride-to-be!