This statement says it all as far as I am concerned.
Many collectors new to this weird collectable mistake that we all have made--collecting marbles, will mistake small bubbles for "Aventurine" or AV (the term "lutz" is reserved for hand made marbles).
Yours is a rather nice Peltier Rainbo.
No Unicorn here my marble collectiing friend.
I feel your excitement and love it but I am glad that you asked.
Marble--On!!