the shoulder.-a chip or fragment, especially a chip of stone as struck off the block by the hammer, having at least one feather-edge.-to break into small pieces, as ore, for the purpose of separating from rock.-to reduce, as irregular blocks of stone, to an approximately level surface by hammering.-to give off spalls, or wedge-shaped chips; -- said of stone, as when badly set, with the weight thrown too much on the outer surface.