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