What is a tiny hard particle as in a of sand?

A tiny hard particle, like a grain of sand, is a small fragment of mineral or rock that typically measures between 0.0625 mm and 2 mm in diameter. These particles are formed through the weathering and erosion of larger rocks over time, often consisting of materials such as quartz, feldspar, or other minerals. Sand grains can vary in color, texture, and composition, depending on their source and the geological processes involved in their formation. In addition to their natural occurrence, sand is widely used in construction, manufacturing, and various industrial applications.