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en.wikipedia.org/wiki/Limestone

Limestone has numerous uses: as a building material, an essential component of concrete (Portland cement), as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paints, as a chemical feedstock for the production of lime, as a soil conditioner, or as a popular decorative addition to rock gardens

study.com/academy/lesson/what-is-limestone-properties-types-uses.html

Because it is widely available, it has been used throughout the centuries for many uses, from building materials to chemical additives. Two of the most famous limestone deposits are the islands of ...

byjus.com/chemistry/uses-of-limestone

Limestone is a type of a sedimentary rock that is found naturally in the earth’s environment. The rock comprises primarily of chemical compound calcium carbonate (CaCO 3) in the form of calcite which is yet again a type of a mineral.It also contains other materials like quartz, clay minerals, pyrite, feldspar, and siderite amongst others.

sciencing.com/limestone-chemical-components-8044801.html

Minor chemical components of limestone include clay, feldspar, pyrite and quartz. Feldspar crystallizes from magma, thus is more commonly found in volcanic rocks. Feldspar is widely used in the ceramic, adhesive and glass industries. Limestone containing pyrite is rare, but has been found Padappakara, India.

geology.com/rocks/limestone.shtml

Limestone has many other uses. Powdered limestone is used as a filler in paper, paint, rubber, and plastics. Crushed limestone is used as a filter stone in on-site sewage disposal systems. Powdered limestone is also used as a sorbent (a substance that absorbs pollutants) at many coal-burning facilities. Limestone is not found everywhere.

geologyscience.com/rocks/sedimantery-rocks/limestone

Limestone Uses. It is the raw material for the manufacture of quicklime (calcium oxide), slaked lime (calcium hydroxide), cement and mortar. Pulverized limestone is used as a soil conditioner to neutralize acidic soils (agricultural lime). Is overwhelmed to be used as aggregate—the strong base for many roads as well as in asphalt concrete.

www.bbc.co.uk/bitesize/guides/z6gqmsg/revision/3

Limestone – which is a sedimentary rock – is a valuable resource from the Earth’s crust. It has many uses. Limestone is also used to remove impurities from the blast furnace when making iron ...

www.graymont.com/en/products/chemical-limestone

Graymont mines some of the best limestone deposits available. As a result, the Company can produce a chemical-grade limestone that satisfies a wide range of industrial and agricultural specifications.

www.reference.com/science/uses-limestone-3138ebcfa0843ddd

Limestone's usefulness stems from its strength and density. Limestone also is used as roofing granules, a coating that helps shingles resist the heat and weathering. Floor tiles, window sills, facing stone and stair treads are commonly made from limestone blocks.

geology.com/usgs/limestone

The purest limestone is even used in foods and medicines such as breakfast cereals and calcium pills. Limestone is also the raw material for making lime (CaO) that is used to treat soils, purify water, and smelt copper. Lime has many additional uses in the chemical industries.