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