Deposition: Gypsum in the beginning varieties as dissolved calcium and sulfate ions in h2o. These ions can originate from many different sources, such as the dissolution of calcium-containing minerals in rocks along with the leaching of sulfur compounds from organic make any difference and volcanic emissions. Hydration of Anhydrite: Gypsum https://www.propanraya.com/id/produk/eco-gypsum-ee-4050