Gypsum Is usually a delicate sulfate mineral composed of calcium sulfate dihydrate, with the chemical method CaSO4·2H2O.[4] It is extensively mined and it is utilised for a fertilizer and because the most important constituent in many sorts of plaster, drywall and blackboard or sidewalk chalk. Once the calcium degrees reach https://www.propanraya.com/id/produk/eco-gypsum-ee-4050