Hydration Of Anhydrite: Gypsum could also type in the hydration of anhydrite (CaSO₄). Anhydrite can be a calcium sulfate mineral that lacks the water molecules existing in gypsum. When exposed to drinking water, anhydrite undergoes a hydration reaction, incorporating h2o molecules into its construction and transforming into gypsum. Deposition: Gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050