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