Gypsum Can be found in hydrothermal veins, that happen to be fractures in rocks full of mineral-abundant fluids that originate from deep inside the Earth's crust. Hydration of Anhydrite: Gypsum could also sort in the hydration of anhydrite (CaSO₄). Anhydrite is actually a calcium sulfate mineral that lacks the water https://www.propanraya.com/id/produk/eco-gypsum-ee-4050