Fluorescence: Fluorescence Is definitely the house of a mineral to emit obvious light when exposed to ultraviolet radiation. Gypsum won't fluoresce underneath UV gentle. Purely natural gypsum is mined from geological deposits. These deposits are typically located in sedimentary rock formations produced via the evaporation of historic seas. Natural gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050