No Matter whether in the form of large gypsum dunes in deserts or the intricate underground worlds of gypsum caves, gypsum’s presence leaves a distinct mark on Earth’s geography and landforms. Gypsum occurs in intensive beds connected with other evaporite minerals (e.g., anhydrite and halite), specially in Permian and Triassic https://www.propanraya.com/id/produk/eco-gypsum-ee-4050