I do not think that Akro ever intended AV to be included in any of the marbles that they manufactured.
This being said--there are some greens that include a bit of what we may call AV--common in many marble manufacturers that had green involved. Just unresolved minerals that even the experts got wrong.
There are many from these “Digs” that involved some black/silver AV but these were discarded from the Factory and dug up later by some of the more passionate that broke the law—love -em!
Marble—On!!