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