Calcite powder is a fine white powder made from the mineral calcite, composed primarily of calcium carbonate (CaCO₃). It is widely used in various industries due to its high purity and chemical properties. In the construction industry, it serves as a primary ingredient in cement, concrete, and lime production. In the plastics and rubber industries, calcite powder acts as a filler, improving product quality and reducing costs. It's also used in paints, coatings, and adhesives for its whiteness and smooth texture. Additionally, calcite powder is utilized in agriculture as a soil conditioner and in the pharmaceutical industry as an antacid.