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