Fluorescence: Fluorescence Would be the residence of the mineral to emit obvious light when exposed to ultraviolet radiation. Gypsum doesn't fluoresce beneath UV mild. Map of gypsum deposits in northern Ohio, black squares point out The placement of deposits, from "Geography of Ohio", 1923 Gypsum is Utilized in lots of https://www.propanraya.com/id/produk/eco-gypsum-ee-4050