Calcium carbonate, represented by the chemical formula CaCO₃, is a common substance found in rocks, shells, and minerals. It is a key component of limestone and marble, and it forms through natural processes like the accumulation of marine organisms' shells. Calcium carbonate is widely used in construction, agriculture, and as a dietary supplement. In addition to its natural occurrences, CaCO₃ plays a significant role in various industries. It is used in the production of cement, as a filler in products like paint and rubber, and in the food industry as an antacid. Its versatility makes it an important material in both environmental and industrial applications.