Gypsum Is actually a tender sulfate mineral composed of calcium sulfate dihydrate, Together with the chemical formula CaSO4·2H2O.[4] It can be extensively mined and it is made use of to be a fertilizer and because the primary constituent in many types of plaster, drywall and blackboard or sidewalk chalk. Even https://www.propanraya.com/id/produk/eco-gypsum-ee-4050