Originally Posted by
Ben325e
Go to Lowes or Home Depot and buy a 12x12 granite tile. They usually have saw there, so have them cut it for you. Should be free to cut. Bring your two stones if you want, or just measurements. Lap the side you want to glue down so it is clean, then glue to the rough side (the back ) of the tile. I only say use the rough side because it should give better glue adhesion with the surface of the stone.
I'd consider myself fortunate if I were you, because pyramids are going to be easier from now on, if that's the technique you use.