Know all about Trachyandesite and Gritstone properties here. All properties of rocks are important as they define the type of rock and its application. Trachyandesite belongs to Igneous Rocks while Gritstone belongs to Sedimentary Rocks.Texture of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Gritstone is Earthy. Trachyandesite appears Dull and Soft and Gritstone appears Layered and Foliated. The luster of Trachyandesite is earthy while that of Gritstone is dull. Trachyandesite is available in black, brown, light to dark grey colors whereas Gritstone is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Trachyandesite are creating artwork, pottery and that of Gritstone are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo), tombstones.