Transparency: Gypsum Can range between transparent to translucent, dependant upon the crystal development and existence of inclusions. Clear crystals allow for light to pass through clearly, whilst translucent specimens make it possible for some gentle passage but appear cloudy or hazy. Density and Particular Gravity: Density refers to the mass https://www.propanraya.com/id/produk/eco-gypsum-ee-4050