Gypsum, prevalent sulfate mineral of excellent professional significance, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-developed crystals the mineral typically has been called selenite. The fibrous significant selection incorporates a silky lustre and is known as satin spar; it is translucent and opalescent and it is valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050