D Stoner intended to facilitate the removal of stones, mud, and other foreign particles from input grains by separating impurities on the basis of their densities. This machine performs based on the density difference by adjusting the aspiration system. D stoner can be used to segregate the granular products where the particles are approximately the same size but, differ in weight. D stoner efficiently removes a small amount of heavy material from a larger quantity of light material. These are designed to have a long operational life and are installed with closed circuit dust aspiration systems and lighting systems to enable easy viewing of the components of the equipment.