Gypsum Are available in hydrothermal veins, that happen to be fractures in rocks full of mineral-rich fluids that originate from deep in the Earth's crust. Hydration of Anhydrite: Gypsum may also sort through the hydration of anhydrite (CaSO₄). Anhydrite can be a calcium sulfate mineral that lacks the drinking water https://www.propanraya.com/id/produk/eco-gypsum-ee-4050