Transparency: Gypsum Can range from clear to translucent, according to the crystal formation and existence of inclusions. Clear crystals make it possible for light-weight to pass through Plainly, though translucent specimens make it possible for some light-weight passage but seem cloudy or hazy. For hundreds of years, gypsum has long https://www.propanraya.com/id/produk/eco-gypsum-ee-4050