Certain design elements are consistent throughout period pieces, making it easy to identify cars, fashions, and even buildings. Authentic jewelry from this period was made between 1920 and 1935 and has at least one, sometimes all, of the following traits listed below. The jewelry styles remained popular through the late 1930s and have since reemerged as one of the most popular antique jewelry styles. Other common diamond cuts for Art Deco era jewelry include antique cushion cut, transitional cut, and Asscher cut.   Where the Edwardian turn of the century jewelry was very nature-inspired, light, and flowy, Art Deco design incorporates more geometric shapes, less free space, and a more industrial feel. These reproductions have a softer, more goopy look to them as opposed to the stark, stamped edges of authentic filigree work. Another sign you are dealing with a reproduction? Most filigree jewelry from the Art Deco era was made with either 10k or 18k white gold. If your jewelry is 14k white gold and has a yellowish tint to it, chances are it is a more modern reproduction. The yellowish tint is because different alloys are used today, differing from those used in the 1920s, making the older gold more grey in its natural state.