After making the two cuts, the shape is roughed out using the two diamond encrusted grinding wheels to the left. They are 120 and 220 grit size and are water cooled. After rough shaping, the gemstone is more finely shaped using the belt wheel on the right. These are interchangable diamond impregnated belts ranging from 220 grit for shaping, up to 50,000 for the final polish. It too is water cooled.