Speaker Enclosures

I have recently come into some granite counter top material(A neighbor is in the remodeling business and offered it to me). Has anyone had any success trying to make speaker enclosures out of this stuff? I have enough to make two medium enclosures but have no clue if it is even feasible to attempt. If any of you DIY'ers out there have any info I would appreciate it before I bite off more than I can chew.