If you go it out of the water you might be alright. I know the ones I got out of the water did'nt freeze,thaw freeze thaw for 100.1000's of years. All the ones not protected by water or buryed below the freeze line has done this. These ones are uselly all fractered up but those water bound ones ar'nt and you get those nice big smooth peices.
I'd carryed that one home also.