Science - Johns Hopkins University The gypsum rock is a very soft rock, composed of calcium sulfate (CaSO 4 ∘2H 2 O) that forms as an evaporite around clay beds. To recognize a gypsum rock, you can easily scratch it with your fingernail, and these rocks are generally light in color. liasion in gypsum powder processing plant india What is Gypsum Powder Processing plant? - Quora. Gypsum Powder Application Gypsum is monoclinic mineral, the main chemical ingredient is sulfuric acid . liasion in gypsum powder processing plant india What is Gypsum Powder Processing plant? - Quora. Gypsum Powder Application Gypsum is monoclinic mineral, the main chemical ingredient is sulfuric acid . Gypsum Board by Archangel Building Materials Trading L.L.C ... The development of all gypsum boards begins with a mineral rock, which is gray to white in color and is called gypsum. The basic mineral is composed of calcium sulfate chemically combined with .    Read More