Map Of gypsum deposits in northern Ohio, black squares suggest the location of deposits, from "Geography of Ohio", 1923 Gypsum is Utilized in a wide variety of purposes: Gypsum are available in hydrothermal veins, that are fractures in rocks stuffed with mineral-rich fluids that originate from deep in the Earth's https://www.propanraya.com/id/produk/eco-gypsum-ee-4050