Calcium sulfate is an inorganic chemical compound that is normally found in three forms named as anhydrous (Anhydrite), dihydrate (Gypsum), and hemihydrate (Plaster of Paris). Anhydrite is a colorless, but inert pigment which is served as a paper filler. Calcium sulfate dihydrate aids in the manufacture of Portland cement. Gypsum works as a pigment in paints, enamels, glazes, and paper. Plaster of Paris is utilized for wall plaster, moldings, and statuary. Its forms are white solids. They are barely soluble in water. Plaster of Paris is a Hemi-hydrate of calcium sulfate obtained from gypsum.