Gypsum is really a tender sulfate mineral composed of calcium sulfate dihydrate, Using the chemical components CaSO4·2H2O.[4] It can be greatly mined and it is used as being a fertilizer and as the key constituent in many kinds of plaster, drywall and blackboard or sidewalk chalk. Regardless of whether the https://www.propanraya.com/id/produk/eco-gypsum-ee-4050