Stone mills are traditional machines used for grinding grains into flour. They consist of two large stones, one stationary and the other rotating, which crush the grain between them. This method preserves the natural oils and nutrients in the grain, resulting in high-quality flour. These mills have been used for centuries and are often powered by water or wind. Today, many artisanal bakers and health-conscious consumers prefer flour from stone mills because it is less processed than flour from modern roller mills. Stone milling is associated with a more sustainable and natural approach to food production.