Art Deco refers to the design style popular during the Jazz Age of the early 20th century. Antique Art Deco rings were made between 1915 and 1935, but many modern engagement rings are made in an Art Deco style. This style features sharp edges, geometric elements, and linear designs. Many designs in Art Deco engagement rings include abstract elements of Egyptian, Asian, or African art. Diamonds were the most popular gemstone for Art Deco rings, and most of these rings were made of platinum. However, some Art Deco engagement rings were made with gold or silver and set with colorful gemstones, such as emeralds, jade, and rubies.