Calamine is a natural admixture mineral of zinc carbonate and hydrous zinc silicate. Calamine is a medication used to treat mild itchiness. 'Chalk' is a variety of limestone composed mainly of calcium carbonate derived from the shells of tiny marine animals known as foraminifera and from calcareous remains of marine algae known as coccoliths. 'Benzol' is a coal-tar product consisting mainly of benzene and toluene. 'Borax' is a powdery white substance, also known as sodium borate, sodium tetraborate, or disodium tetraborate. It is a combination of boron, sodium, and oxygen. It is widely used as a household cleaner and a booster for laundry detergent.