Know all about Trachyte and Oil shale properties here. All properties of rocks are important as they define the type of rock and its application. Trachyte belongs to Igneous Rocks while Oil shale belongs to Sedimentary Rocks.Texture of Trachyte is Aphanitic to Porphyritic whereas that of Oil shale is Splintery. Trachyte appears Banded and Oil shale appears Muddy. The luster of Trachyte is metallic while that of Oil shale is dull. Trachyte is available in black, brown, dark greenish - grey, green, grey, light to dark grey, white colors whereas Oil shale is available in black, brown, buff, green, grey, red, yellow colors. The commercial uses of Trachyte are cemetery markers, creating artwork and that of Oil shale are an oil and gas reservoir.