Lucite, an acrylic resin, was first marketed by DuPont in 1937. Lucite began to appear in costume jewelry around 1940. Like Bakelite, it is a thermoset plastic, but it was much cheaper to produce. Lucite could be molded, cast, laminated, inlaid, and carved. Although in its original state it is clear and colorless, it could be tinted any color of the rainbow, from transparent to opaque. Lucite continues to be used in jewelry manufacture, but it reached its height of popularity in the 1940s-1950s. Common post-war pieces of interest to collectors include clear Lucite imbedded with glitter, seashells, rhinestones, or flowers. When placed briefly in hot water, Lucite is odorless. Older Lucite can develop cracks from age or exposure to heat.