Deposition: Gypsum Initially varieties as dissolved calcium and sulfate ions in water. These ions can originate from many different sources, such as the dissolution of calcium-made up of minerals in rocks along with the leaching of sulfur compounds from organic and natural subject and volcanic emissions. Hydration of Anhydrite: Gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050