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