Gypsum is often a comfortable sulfate mineral composed of calcium sulfate dihydrate, While using the chemical formula CaSO4·2H2O.[4] It's broadly mined and is also made use of for a fertilizer and because the primary constituent in many sorts of plaster, drywall and blackboard or sidewalk chalk. Calcination: The rock is https://www.propanraya.com/id/produk/eco-gypsum-ee-4050