For additional thorough information about unique rocks and minerals, and wherever they are available in America, click on the button beneath. Crystal Method: Gypsum crystals belong to your monoclinic crystal system. This crystal construction has 3 unequal axes, with one particular angle involving axes becoming non-ninety degrees. Hydration of Anhydrite: https://www.propanraya.com/id/produk/eco-gypsum-ee-4050