Iran is the first country in mine capacity about 900, million ton, the second one after in gypsum consumption and second gypsum producer aftter America (USA) in most of the world gypsum is under ground dehydrate sulfat caso4 –(2h2o) but in Iran gypsum mines are surface extract as opencast methads.
Semnan gypsum mines on of the oldeit and has high guality in degree of %96 purity and capacity and is the most mineral production in Semnan with 7million ton production Semnan mines suppiy %6 of world gypsum and %80 of Iran gypsum.
Pardisun gypsum company , supply its own row gypsum with %98 degree of purity and according to qualitative survey in physical and chemical and mechanical tests in company,s laboratory accerdingto with standards of Iran and the World from its mines in herat.