Gypsum Can be found in hydrothermal veins, which are fractures in rocks crammed with mineral-prosperous fluids that originate from deep inside the Earth's crust. Hydration of Anhydrite: Gypsum may also type from the hydration of anhydrite (CaSO₄). Anhydrite can be a calcium sulfate mineral that lacks the drinking water molecules https://www.propanraya.com/id/produk/eco-gypsum-ee-4050