Density And Distinct Gravity: Density refers back to the mass for every unit quantity of the compound, though certain gravity compares a mineral's density to the density of water. Gypsum happens in considerable beds affiliated with other evaporite minerals (e.g., anhydrite and halite), particularly in Permian and Triassic sedimentary formations; https://www.propanraya.com/id/produk/eco-gypsum-ee-4050