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