Fluorescence: Fluorescence Is definitely the home of a mineral to emit obvious light-weight when exposed to ultraviolet radiation. Gypsum won't fluoresce beneath UV light-weight. Map of gypsum deposits in northern Ohio, black squares indicate The placement of deposits, from "Geography of Ohio", 1923 Gypsum is used in a wide variety https://www.propanraya.com/id/produk/eco-gypsum-ee-4050