Fluorescence: Fluorescence Is definitely the property of the mineral to emit noticeable gentle when subjected to ultraviolet radiation. Gypsum doesn't fluoresce beneath UV light. Map of gypsum deposits in northern Ohio, black squares reveal 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