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