Cory, if you do a online search using Google, or probably any other search engine, you'll find sites that'll give you some directions.
To make the pots, the easiest equipment to use is a lathe. But some do use a drill press. As for the slate, most buy it pre-cut from a quary in Pennsylvania.
I've seen a few of the turtle shell slates. They are really cool. Just make sure it's legal in your state to possess one.