Whether In the shape of large gypsum dunes in deserts or even the intricate underground worlds of gypsum caves, gypsum’s presence leaves a distinct mark in the world’s geography and landforms. Gypsum happens in considerable beds affiliated with other evaporite minerals (e.g., anhydrite and halite), especially in Permian and Triassic https://www.propanraya.com/id/produk/eco-gypsum-ee-4050