Know all about Shale and Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Shale belongs to Sedimentary Rocks while Trachyandesite belongs to Igneous Rocks.Texture of Shale is Clastic, Splintery whereas that of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Shale appears Muddy and Trachyandesite appears Dull and Soft. The luster of Shale is dull while that of Trachyandesite is earthy. 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 Shale and Trachyandesite are creating artwork, pottery.