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