Density And Precise Gravity: Density refers back to the mass per unit quantity of the material, while precise gravity compares a mineral's density on the density of h2o. Crystal Method: Gypsum crystals belong into the monoclinic crystal technique. This crystal composition has three unequal axes, with one angle among axes https://www.propanraya.com/id/produk/eco-gypsum-ee-4050