Dolomite CaO content (wt%) 30.62%. MgO content (wt%): 22.14%. SiO2 content (wt%):3.68% Dolomite1.CaO content (wt%) 30.62%.2.MgO content (wt%): 22.14%.3.SiO2 content (wt%):3.68%Mainly used in glass industry, a few to be make ceramic.Contact: Ms. Liu Pingemail, liuping at pvc dot cn dolomite, white color