Fluorescence: Fluorescence may be the assets of the mineral to emit noticeable light when exposed to ultraviolet radiation. Gypsum isn't going to fluoresce under UV gentle. Map of gypsum deposits in northern Ohio, black squares show The situation of deposits, from "Geography of Ohio", 1923 Gypsum is Employed in numerous https://www.propanraya.com/id/produk/eco-gypsum-ee-4050