Know all about Oil shale and Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Oil shale belongs to Sedimentary Rocks while Trachyandesite belongs to Igneous Rocks.Texture of Oil shale is Splintery whereas that of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Oil shale appears Muddy and Trachyandesite appears Dull and Soft. The luster of Oil shale is dull while that of Trachyandesite is earthy. Oil shale is available in black, brown, buff, green, grey, red, yellow colors whereas Trachyandesite is available in black, brown, light to dark grey colors. The commercial uses of Oil shale are an oil and gas reservoir and that of Trachyandesite are creating artwork, pottery.