Hydration Of Anhydrite: Gypsum may type from the hydration of anhydrite (CaSO₄). Anhydrite is often a calcium sulfate mineral that lacks the water molecules present in gypsum. When exposed to h2o, anhydrite undergoes a hydration response, incorporating drinking water molecules into its construction and remodeling into gypsum. Salt Flats: Gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050