Hydration Of Anhydrite: Gypsum might also sort through the hydration of anhydrite (CaSO₄). Anhydrite is a calcium sulfate mineral that lacks the drinking water molecules current in gypsum. When exposed to h2o, anhydrite undergoes a hydration reaction, incorporating h2o molecules into its composition and reworking into gypsum. Salt Flats: Gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050