<unk>  is a common laboratory and industrial chemical. In the form of γ-anhydrite (the nearly anhydrous form), it is used as a desiccant. It is also used as a coagulant in products like tofu.  In the natural state, unrefined<unk>  is a translucent, crystalline white rock. When sold under the name Drierite, it appears blue or pink due to impregnation with cobalt chloride, which functions as a moisture indicator. The hemihydrate (CaSO4.~0.5H2O) is better known as plaster of Paris, while the dihydrate (CaSO4.2H2O) occurs naturally as gypsum.  The anhydrous form occurs naturally as β-anhydrite.  Depending on the method of calcination of<unk>  dihydrate, specific hemihydrates are sometimes distinguished:  alpha-hemihydrate and beta-hemihydrate.  They appear to differ only in crystal size.  Alpha-hemihydrate crystals are more prismatic than beta-hemihydrate crystals and when mixed with water form a much stronger and harder superstructure ( ITS ALSO FOUND IN WONDER BREAD!!).
Calcium sulfate
Calcium acetate
Calcium citrate
Calcium carbonate
Calcium carbonate 
Potassium citrate
Strontium ranelate
Magnesium aspartate