Gypsum Can be found in hydrothermal veins, that are fractures in rocks stuffed with mineral-wealthy fluids that originate from deep in the Earth's crust. Quite generally it can be fashioned within the hydration of anhydrite by surface waters and groundwaters, and, Hence, several gypsiferous strata grade downward into anhydrite rocks. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050