Counter (http://GialloFiorito.com) top edging

I am looking to do a Granite (http://tanbrown.org) tile kitchen Counter (http://GialloFiorito.com) top and (http://maplered.com) I wanted to miter the edges for the overhang. what is the best way to do that? I was going to do the top then just match up the miter corners of the vertical edge. I was wondering how much the thinset will extend the tile on the vertical face out.
Do you put a spacer in between the mitered corner joint or is that something that you would but up tight and (http://maplered.com) put caulk in?
I am trying to find out what is a good blade for Granite (http://tanbrown.org) , I have jut bought a MK 370exp a 7" wet saw. It came with a blade but I cant even find a blade identification on it.