I would use a cutoff disk in an angle grinder.


Change this to "lots of cutoff discs". I think I went through half a dozen
discs (maybe more) to slice off a piece of 6" clay tile. Of course the mileage
will vary.
Had pretty good sucess on a job with 4" tile using a cheap 7 1/4" Chinese made
diamond blade in a regular power saw. The tiles were not yet buried in that
case. Maybe a diamond blade could be had for an angle grinder...it would be a
real quick deal if so. Good luck.

Joe