Abstract: An apparatus or machine is disclosed for automatic establishing and cutting the corner lines in a piece of stone. The machine includes two pairs of saw blades, each pair disposed on opposite sides of the stone. The saw blades are adjustable in two directions with respect to each other to properly locate the saw blades with respect to the four corners of the stone. Laser light sources are positioned to provide light beams down onto the piece of stone at the precise location of the outer edge of the saw blade. The laser light sources assist the machine operator in properly positioning the stone with respect to the saw blades. Once the stone is properly located, the saw blades are moved into cutting engagement with the stone. After the four corner lines of the stone have been cut, these corner lines precisely establish the dimensions of the rectangles on the top and bottom stone surfaces, and the four vertical corner lines connecting the two rectangles.