No chance of it being CAC imho.
The first image shows a "Pinch" from the folding of the marble. You can see how it folded in image four the best, just look at the transparent part.
The last image shows some dimples in the reddish/orange patch along with a chunk or two of floating green AV. The reddish orange does appear to stretch to a yellow hue. I associate these clues with Pelt more so than Akro.
I will concede and say that it may have been intended to be a Rainbo.
A fun thread for such a marble to be sure!!
This one has been beat to death.
Thanks all for keeping this marble ID going regardless of monetary value.
Marble--On!!