Gypsum Can be a soft sulfate mineral composed of calcium sulfate dihydrate, With all the chemical components CaSO4·2H2O.[four] It can be commonly mined and it is used being a fertilizer and because the main constituent in many forms of plaster, drywall and blackboard or sidewalk chalk. Cement Producing: Selected forms https://www.propanraya.com/id/produk/eco-gypsum-ee-4050