Know all about Oil shale and Trachyte 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 Trachyte belongs to Igneous Rocks.Texture of Oil shale is Splintery whereas that of Trachyte is Aphanitic to Porphyritic. Oil shale appears Muddy and Trachyte appears Banded. The luster of Oil shale is dull while that of Trachyte is metallic. Oil shale is available in black, brown, buff, green, grey, red, yellow colors whereas Trachyte is available in black, brown, dark greenish - grey, green, grey, light to dark grey, white colors. The commercial uses of Oil shale are an oil and gas reservoir and that of Trachyte are cemetery markers, creating artwork.