Coarse emery powder is mixed with about half its weight of pulverized Stourbridge loam, and a little water or other liquid to make a thick paste; this is pressed into a metallic mould by means of a screw-press, and, after being thoroughly dried, is baked or burned in a muffle at a temperature above a red, and below a white heat. This forms an artificial emery-stone, which cuts very greedily, with very little wear to Itself. Unequalled for grinding and polishing glass, metals, enamels, stones, etc.