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