Limestone is a sedimentary rock composed primarily of calcium carbonate ($\text{CaCO}_3$). Its formation typically occurs through the accumulation and cementation of mineral deposits, often derived from the skeletal remains of marine organisms, though it can also precipitate from chemical reactions within water bodies. Chemically, the material can be processed through thermal decomposition to yield lime, a fundamental component in the manufacture of cement and various construction materials. Beyond construction, limestone plays a critical role in industrial processes due to its mineral content; for example, when used in agriculture, its liming properties can help neutralize acidic soils, thereby improving nutrient availability for plant growth. The physical characteristics and chemical purity of limestone dictate its various uses in metallurgy, chemical production, and construction.