Gypsum is really a soft sulfate mineral composed of calcium sulfate dihydrate, With all the chemical components CaSO4·2H2O.[four] It is greatly mined and is also utilised as a fertilizer and because the primary constituent in many varieties of plaster, drywall and blackboard or sidewalk chalk. Crystal Process: Gypsum crystals belong https://www.propanraya.com/id/produk/eco-gypsum-ee-4050