Hydration Of Anhydrite: Gypsum can also type with the hydration of anhydrite (CaSO₄). Anhydrite is a calcium sulfate mineral that lacks the h2o molecules present in gypsum. When exposed to water, anhydrite undergoes a hydration reaction, incorporating h2o molecules into its framework and remodeling into gypsum. Soil Amendment: Gypsum, often https://www.propanraya.com/id/produk/eco-gypsum-ee-4050