wopchop
Building Toronto
It really is a shame that it could not be 're-purposed' for civic projects elsewhere, ground up and used as gravel seems like a sad end if that is indeed the case for the bulk of it.
I've seen some of the granite that has been removed up close, and it has aged really really badly. Some of the pieces are extremely bowed and deformed. I know that some of the intact pieces that were transported off site were shattered during transit because of this. I can't imagine that it would be very easy or cost-effective to re-purpose it intact. They're better off recycling the material itself and using it for something else.