Among the salts considered as natural medicinal resources, chloride-sodium salt holds a special place. Rock salt was created both during the process of sea-water crystallisation and on the surface of the planet in the form of saline efflorescence, referred to as saline soil. Salt lakes also exist.

The main ingredient of rock salt is halite (NaCl). In addition, admixtures of other minerals such as anhydrite, carbonate, quartz, kieserite and/or pyrite can occur. With no admixture, salt is white; however, when it contains minerals, then it can be grey, yellow, pink, orange, or even green, depending on the composition.

Dead Sea salt is characteristic in terms of content, containing large amounts of potassium, calcium, magnesium and bromine. Iodine, however, occurs in small quantities as a result of its volatility during evaporation in the sun. The salinity of the Dead Sea is around twenty-eight per cent, making it one of the world’s most highly saline bodies of water. Contrary to its name, though, it is a lake and not a sea. The most salty of the seas, on the other hand, is the Red Sea, at between 3.7 and 4.2 per cent. The Dead Sea’s high saline content led to the almost complete disappearance of organic life from its waters. Its salt demonstrates numerous medicinal properties and is also used in the beauty industry.