Whilst It has limits at high temperatures and salinity, gypsum continues to be a worthwhile choice for particular drilling purposes. Gypsum occurs in comprehensive beds connected to other evaporite minerals (e.g., anhydrite and halite), specially in Permian and Triassic sedimentary formations; it is deposited from ocean brine, accompanied by anhydrite https://www.propanraya.com/id/produk/eco-gypsum-ee-4050