This Method can occur In a natural way underground the place anhydrite deposits experience groundwater or for the duration of anthropogenic pursuits that disturb buried anhydrite layers. Gypsum occurs in extensive beds associated with other evaporite minerals (e.g., anhydrite and halite), especially in Permian and Triassic sedimentary formations; it is https://www.propanraya.com/id/produk/eco-gypsum-ee-4050