Hydration Of Anhydrite: Gypsum also can sort in the hydration of anhydrite (CaSO₄). Anhydrite is really a calcium sulfate mineral that lacks the water molecules current in gypsum. When exposed to water, anhydrite undergoes a hydration reaction, incorporating drinking water molecules into its construction and remodeling into gypsum. Soil Modification: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050