The commonest Akro Agate corkscrew marbles was called a Prize Name (or sometimes Prizename), which had two opaque colors in a corkscrew design. The corkscrew pattern was achieved by adding two or more streams of molten colored glass sheared and dropped into a spinning cup. The rate by which the cup spun determined the number of twists in the corkscrew. If the cup was not spinning, a patch marble was created.
Prize Names with an opaque white base are the most common; those with a color base (that is, two opaque colors) command a strong premium, especially in the more striking or rare color combinations. A corkscrew marble with more than two opaque colors is called a Special, and are listed in their own category.