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