Gypsum can be a delicate sulfate mineral composed of calcium sulfate dihydrate, With all the chemical formulation CaSO4·2H2O.[four] It truly is broadly mined and is particularly made use of for a fertilizer and because the main constituent in many varieties of plaster, drywall and blackboard or sidewalk chalk. Around geological https://www.propanraya.com/id/produk/eco-gypsum-ee-4050