Gypsum Can be found in hydrothermal veins, which can be fractures in rocks filled with mineral-rich fluids that originate from deep within the Earth's crust. Normal gypsum is mined from geological deposits. These deposits are typically present in sedimentary rock formations developed through the evaporation of historic seas. Organic gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050