Know all about Trachyandesite and Pyrolite properties here. All properties of rocks are important as they define the type of rock and its application. Trachyandesite and Pyrolite belong to Igneous Rocks.Texture of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Pyrolite is Phaneritic. Trachyandesite appears Dull and Soft and Pyrolite appears Rough and Shiny. The luster of Trachyandesite is earthy while that of Pyrolite is shiny. Trachyandesite is available in black, brown, light to dark grey colors whereas Pyrolite is available in dark greenish - grey colors. The commercial uses of Trachyandesite are creating artwork, pottery and that of Pyrolite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds.