Density and Certain Gravity: Density refers to the mass for each device volume of a material, although unique gravity compares a mineral's density to your density of drinking water. Gypsum occurs in extensive beds linked to other evaporite minerals (e.g., anhydrite and halite), significantly in Permian and Triassic sedimentary formations; https://www.propanraya.com/id/produk/eco-gypsum-ee-4050