Hydration Of Anhydrite: Gypsum may type from 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 drinking water molecules into its structure and transforming into gypsum. Soil Amendment: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050