Transparency: Gypsum Can vary from clear to translucent, according to the crystal development and existence of inclusions. Clear crystals enable light to go through clearly, though translucent specimens make it possible for some light-weight passage but appear cloudy or hazy. Salt Flats: Gypsum is a typical component of salt flats, https://www.propanraya.com/id/produk/eco-gypsum-ee-4050