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