The Surface Lane Polisher pictured here provides any kind of finish on granite or natural stone, from coarse to superfine or polish. Typically the process follows these steps: a large piece of natural stone or individual stones (in this case it's a combination of a ten-foot slab of grantie with seven additional smaller granite stones) are placed in a special surfacing bed and made level. A concentric cast iron wheel is then run over the surface and fed a mixture of synthetic abrasive grit. Starting from an 80 grit consistency and finishing with an 800 grit, the stone then has a true honed surface. So precise is this procedure that it's used for the manufacturing of surface plates for departments such as the Lawrence Livermore Lab and other Silicon Valley engineering firms. The cast iron wheel is then replaced with a 36" buffing wheel. Under high speed operations and with the application of a tin oxide compound, the granite is then heated up. As the granite gets hot, the composition of its grains naturally seal, changing its physical characteristics to that of a high polished surface. This is the hightest luster polish and most durable, which can be applied to granite or natural stone.