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