Gypsum is usually a gentle sulfate mineral composed of calcium sulfate dihydrate, Together with the chemical formula CaSO4·2H2O.[4] It really is broadly mined and is also utilised as being a fertilizer and because the primary constituent in several forms of plaster, drywall and blackboard or sidewalk chalk. Crystal Process: Gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050