Limestone is a type of sedimentary rock primarily made up of calcium carbonate. It forms from the remains of marine organisms, such as coral and shells, which accumulate on the ocean floor over millions of years. This rock is often light-colored and can be found in various places around the world, making it a common material in construction and landscaping. In addition to its use in building, limestone is also important in agriculture. It helps to improve soil quality by neutralizing acidity, which benefits crops. Furthermore, limestone is a key ingredient in the production of cement and is used in the manufacturing of lime, a substance that has many industrial applications.