What Is The Symbol Of Limestone?

What Is The Symbol Of Limestone? Limestone consists of calcium carbonate, which has the chemical formula CaCO3. Is CaCO3 a limestone? Limestone is a sedimentary rock made of calcium carbonate (CaCO3), usually in the form of calcite or aragonite. It may contain considerable amounts of magnesium carbonate (dolomite) as well. However, minor constituents of clay,