Onyx above ;
"Ace" refers to the translucent milky base glass in the OP IMO
MCSA ID reference
Corkscrews are identifiable as being two or more spirals of color that rotate around the marble from one pole to the other, but do not intersect. Different color combinations and designs were marketed by Akro Agate under a variety of names: Prize Name (two opaque colors), Special (three or more opaque colors), Ace (one opaque color and translucent milky white), Spiral (transparent clear base with colored spiral), Onyx (transparent color base with opaque white spiral). In addition, other names have been applied by children and collectors over the years: Snake (a Spiral or Onyx where the opaque or colored glass is on the surface and just below it), Ribbon (a Spiral or Onyx where the opaque or colored glass goes almost to the center of the marble), “Ades” (types of Aces with fluorescent base glass), and Popeye (a specific type of Special commonly found in Popeye marble boxes).