Ask and ye shall recieve, Seek and ye shall find!!!

Last week, I asked where I could find slate since we don't have any native around here. Well, I asked around the deercamp today and much to my surprise, One of the guys was doing some tractor work for a fellow and had run over and cracked an old pooltable bed. I NOW HAVE SLATE--LOTS OF IT!!! The only problem is that it is an inch thick!

The question is what's the best way to cut this down to usable thicknesses? I have a radial arm saw, a table saw, and a drillpress to work with. What type of blade do I need?