The Arkansas design features a mallard duck in flight, several stalks of rice and a cut diamond. All three elements are superimposed over a tree-lined river scene. The mallard symbolizes the state's abundant natural resources. The rice pays homage to Arkansas' standing as the leading rice producer in the United States. The diamond is a significant element in the design in that the Crater of Diamonds State Park near Murfreesboro is the eighth largest diamond deposit in the world. It's also the site where the largest diamond ever unearthed in the United States was found: a 40.23-carat diamond discovered in 1924. The park is the only site in the world where the public can search for diamonds.