CaCO3 (calcium carbonate)

Calcium carbonate (CaCO3) is a chemical compound commonly found in rocks, shells of marine organisms, and even in our bodies, as it forms bones and teeth. It appears in everyday items like chalk, limestone, and marble. Calcium carbonate is used in various industries, from construction to food production, where it serves as a calcium supplement or an antacid. In nature, it plays a vital role in carbon cycling and acts as a buffer in water systems. Overall, it’s a versatile substance essential for both the environment and human health.