Hydration Of Anhydrite: Gypsum can also kind from the hydration of anhydrite (CaSO₄). Anhydrite is usually a calcium sulfate mineral that lacks the drinking water molecules existing in gypsum. When exposed to drinking water, anhydrite undergoes a hydration response, incorporating water molecules into its composition and remodeling into gypsum. Deposition: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050