Salt (sodium chloride) is a flavor enhancer and is one of the few minerals commonly eaten by humans. There are different forms of edible salt: unrefined salt (such as sea salt), refined salt (table salt), and iodized salt. Salt is a crystalline solid, white, pale pink or light grey in color, normally obtained from sea water or rock deposits. Natural sea salt includes vital trace minerals in addition to the sodium chloride. Edible rock salts may be slightly greyish in color due to this mineral content.