Gypsum Are available in hydrothermal veins, that are fractures in rocks crammed with mineral-abundant fluids that originate from deep throughout the Earth's crust. Map of gypsum deposits in northern Ohio, black squares show The situation of deposits, from "Geography of Ohio", 1923 Gypsum is Utilized in numerous types of purposes: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050