High Quality Content by WIKIPEDIA articles! Bischofite (bishofit) is a hydrous magnesium chloride mineral with formula MgCl2·6(H2O). It belongs to halides and is a sea salt concentrate dated from the Permian Period (nearly 200 million years ago). Bischofite is ecologically pure natural magnesium poly-mineral which is unique by its composition, and which by content of important for human health and vital activity macro- and micro-elements much more exceeds the natural analogies like sea and ocean salts. The main bishofit compound is magnesium chloride (up to 350 g/L), moreover, it contains about 70 other elements as impurities, including potassium, sodium, bromine, boron, calcium, silicon, molybdenum, silver, zinc, iron and copper.