Biophysite of a hydrated magnesium chloride mineral of formula O 2H6. 2MgCl. The specific gravity of bishophyte is 0.5 g / cm3 and its molecular mass is 2.5. Biophysite has many applications in industry and agriculture. Extraction of high purity bichophyte from brines has been done in the solar evaporation pools of the Potash Complex. There are many methods for the extraction of biophysite such as solar evaporation and ion exchange.