Hydration Of Anhydrite: Gypsum could also variety with the hydration of anhydrite (CaSO₄). Anhydrite is usually a calcium sulfate mineral that lacks the water molecules present in gypsum. When subjected to h2o, anhydrite undergoes a hydration response, incorporating h2o molecules into its structure and reworking into gypsum. Plaster: Gypsum plaster https://www.propanraya.com/id/produk/eco-gypsum-ee-4050