Toxicological Trivia from August 27, 2015: Sodium chloride /ˌsoʊdiəm ˈklɔraɪd/,[2] also known as salt, common salt, table salt or halite, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions. Sodium chloride is the salt most responsible for the salinity of seawater and of the extracellular fluid of many multicellular organisms. In the form of edible or table salt it is commonly used as a condiment and food preservative. There are four types of salt, according to their origin: sea salt and spring, obtained by evaporation, rock salt coming from the mining of ore and rock salt plant. Salt gives food one of the basic tastes salty. Salt is the only edible rock by man and is possibly the oldest spice used by humans, its importance for life is such that has marked the development of the story many times, moving economies, being taxed monopolies, wars, etc., can become a kind of currency. Rock salt  is called:1) Halite;2) Apatite;3) Barilla.

Correct Answer: a. Read more in WP. See also Spanish page.