Limestone is a sedimentary rock composed mainly of calcium carbonate (CaCO3), which can be formed from the accumulation of shells, corals and other organic materials, or by chemical precipitation.
Limestone is distinguished by its high concentration of calcium carbonate. Their texture can vary from fine to coarse depending on their origin and formation. Generally, limestone has colours ranging from white to grey, although it can also have yellow, brown or red tones due to mineral impurities.
In construction, limestone is essential for the production of cement and lime, and is used in the building of structures and monuments. In the chemical industry, it is used in the manufacture of glass, paper and steel. In agriculture, limestone is used to neutralise the acidity of the soil, improving its fertility.
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