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