| Symbol | CaSO4·2H2O |
|---|
This is a short overview. For the background — history, value over time and notable mines — see Gypsum →
Occurs in: Evaporite Deposits →
A soft sulphate mineral, formed by the evaporation of ancient seawater. Its finest, purest, translucent form is alabaster — long prized for sculpture and decorative carving — while coarser gypsum is calcined to make plaster of Paris and used directly in cement manufacture.