On 18 Jul 2005 08:07:30 -0700, "jtpr" wrote:

Also what unusual safty problems might I encounter?

Goats that fight back and knock you off the bridge?

If you're serious (fat chance - you're posting from Google) then get
yourself an angle grinder. 8" gives a better cut depth, 4 1/2" is
generally more useful. Cheap grinders are _really_ cheap and work well,
but they're twice the wright of a good one and don't last too well.

Stone grinding or cutting disks are cheap. A diamond cutting disk is
reasonably priced these days and works far better.

Dust is a hazard and will destroy a good table saw. You can wear a
respirator, your saw can't.

To drill it, either hire a core drill and drill for the day, or buy
yourself an SDS impact drill (_not_ a regular hammer drill). Then chain
drill small holes in a ring and chisel out between.

You can do all this in granite or serpentinite, which are the hardest
beach pebbles you're likely to find. Anything softer is even easier.
Generally the smoother the pebble, the harder the stone (soft ones just
break up before they're polished).