Transparency: Gypsum Can range between clear to translucent, depending on the crystal formation and existence of inclusions. Clear crystals make it possible for mild to pass through Plainly, when translucent specimens enable some gentle passage but look cloudy or hazy. Salt Flats: Gypsum is a typical part of salt flats, https://www.propanraya.com/id/produk/eco-gypsum-ee-4050