A black emery stone millstone is constructed out of black emery stone, a strong and durable material used to grind grains into flour. Traditional grain mills have utilized millstones for generations to grind wheat, corn, and other grains into flour. The black emery stone millstone is recognized for grinding grains into fine flour due to its hard and abrasive character. The stone's rough surface aids in the effective breakdown of grains, resulting in a finer flour texture than other varieties of millstones. This is a 12 inches (300 mm) black emery stone for the 2 HP Flour mill/Atta Chakki.