Rajasthan is rich in non-metallic and industrial minerals. The minerals found in the state include Limestone, Dolomite, Lignite, Barytes, Calcite, Clay, Emerald, Feldspar, Emerald, Fluorite, Garnet, Gypsum, Potash, Rock-Phosphate, Silica sand, Siliceous Earth, Soapstone, Wollastonite, Marble, Granite, Sand stone and Slates.