Gypsum, typical sulfate mineral of terrific industrial great importance, composed of hydrated calcium sulfate (CaSO4·2H2O). In nicely-created crystals the mineral usually is named selenite. The fibrous large range provides a silky lustre and is called satin spar; it can be translucent and opalescent which is valued for ornaments and jewellery. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050