Gypsum is really a smooth sulfate mineral composed of calcium sulfate dihydrate, Along with the chemical formulation CaSO4·2H2O.[4] It is commonly mined and is particularly utilized to be a fertilizer and because the principal constituent in several kinds of plaster, drywall and blackboard or sidewalk chalk. Above geological time scales, https://www.propanraya.com/id/produk/eco-gypsum-ee-4050