Transparency: Gypsum Can range from clear to translucent, based on the crystal formation and presence of inclusions. Clear crystals let mild to go through Plainly, when translucent specimens allow some light passage but seem cloudy or hazy. Density and Certain Gravity: Density refers back to the mass for each unit https://www.propanraya.com/id/produk/eco-gypsum-ee-4050