Density and Unique Gravity: Density refers back to the mass for each unit volume of a substance, though particular gravity compares a mineral's density into the density of water. Gypsum takes place in substantial beds associated with other evaporite minerals (e.g., anhydrite and halite), significantly in Permian and Triassic sedimentary https://www.propanraya.com/id/produk/eco-gypsum-ee-4050