Ashlar will yield, on average, about 65 sq/ft per ton depending on the application.
Fieldstone is priced by the ton.
Ashlar is finely dressed (cut, worked) masonry, either an individual stone that has been worked until squared or the masonry built of such stone. Ashlar is one of the finest stone masonry unit. Ashlar is capable of very thin joints between blocks, and the visible face of the stone may feature a variety of decorative treatments from quarry faced to tooled to smoothly polished.