Concrete Millstone w/ Acid Stain. diymoldsAug 21, 2016 . Made it free hand with a styrofoam mold. diymolds.mini cement millstones,How Millstones Grind - Penn State EngineeringStudents will compare millstone patterns to identify how the grain is turned into flour as . stationary - in fact, it is set into a bed of concrete or mortar to make it literally rock stable. . Poke a small hole in the very center of the piece of cardboard.
mini cement millstones