Apart From getting considerable, gypsum is well refined into a powder for plaster or fashioned into sheets of wallboard. Map of gypsum deposits in northern Ohio, black squares indicate the location of deposits, from "Geography of Ohio", 1923 Gypsum is Employed in numerous types of programs: Pleochroism: Pleochroism refers to https://www.propanraya.com/id/produk/eco-gypsum-ee-4050