The Art Deco style emerged after World War I and dominated the decorative arts and jewelry from 1920 through the 1930s. The Roaring Twenties were a decadent period in the history of the United States, famous for flapper fashion, gangsters and jazz music. The emphasis of speed that was popular in this era, due to the rise of the automobile and airplane, is also evident in jewelry design. Many Art Deco jewelry pieces featured speed motifs including arrows, cars, planes and panthers. Art Deco jewelry is famous for intense, bold colors, geometric design and the incorporation of a variety of colorful gemstones in one piece. Art Deco jewelry, both costume and fine, is very popular with collectors.