Transparency: Gypsum Can vary from transparent to translucent, depending upon the crystal formation and existence of inclusions. Clear crystals allow for mild to go through Plainly, while translucent specimens enable some mild passage but surface cloudy or hazy. For hundreds of years, gypsum has been utilized for plaster and pigments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050