Gypsum Is usually a tender sulfate mineral composed of calcium sulfate dihydrate, Together with the chemical system CaSO4·2H2O.[4] It truly is widely mined and is also utilised as being a fertilizer and because the primary constituent in many forms of plaster, drywall and blackboard or sidewalk chalk. Agates: A form https://www.propanraya.com/id/produk/eco-gypsum-ee-4050