Slate blocks are usually cut using either a hand-held slate cutter or a machine saw. In the case of hand-held slate cutters, the tool has a sharp blade that is run along a straight edge to create the necessary cut. This process requires a lot of precision and expertise, as it is essential to make the cut cleanly and evenly.

In the case of machine saws, experts use specialized equipment that is designed to cut through the hard slate blocks effectively. The cutting is typically done with a diamond-tipped blade, which enables a clean and precise cut through the slate. The machine is guided by a computer program that ensures the cut is made to the specific shape and size desired. This method is highly efficient and is used for large-scale productions.