Know all about Skarn and Claystone properties here. All properties of rocks are important as they define the type of rock and its application. Skarn belongs to Metamorphic Rocks while Claystone belongs to Sedimentary Rocks.Texture of Skarn is Earthy, Mud-rich, Rough whereas that of Claystone is Clastic. Skarn appears Dull and Claystone appears Rough and Dull. The luster of Skarn is waxy and dull while that of Claystone is dull. Skarn is available in black, brown, colourless, green, grey, white colors whereas Claystone is available in black, blue, brown, green, grey, orange, red, white, yellow colors. The commercial uses of Skarn are creating artwork, gemstone, jewelry, metallurgical flux, source of magnesia (mgo) and that of Claystone are pottery.