Art Deco rings often display patterns like octagons, chevrons, and grids with a modern tone. What makes a 1930s diamond ring truly unique is the vintage designs, which include those inspired by nature. The diamonds in that period are brilliantly cut than precursors to Art Deco. Emerald cut diamonds are a trendy choice as the center stone, while platinum metal bands are popular. Think of an Art Deco diamond flower ring as a classic example of the period piece. They usually feature a platinum or white gold band, which came into prominence as it was affordable during the times of economic constraints. Another unique aspect of an Art Deco engagement ring is the colored accent stones, which highlight the geometry of the design. Specifically, colored gemstones such as ruby, emerald, onyx, and sapphire are popular accent stones in Art Deco rings.