Know all about Trachyandesite and Quartzite properties here. All properties of rocks are important as they define the type of rock and its application. Trachyandesite belongs to Igneous Rocks while Quartzite belongs to Metamorphic Rocks.Texture of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Quartzite is Foliated, Granular. Trachyandesite appears Dull and Soft and Quartzite appears Lustrous. The luster of Trachyandesite is earthy while that of Quartzite is vitreous. Trachyandesite is available in black, brown, light to dark grey colors whereas Quartzite is available in black, blue, brown, green, light grey, purple, white, yellow colors. The commercial uses of Trachyandesite are creating artwork, pottery and that of Quartzite are an oil and gas reservoir, as armour rock for sea walls, cemetery markers, commemorative tablets, in aquifers, laboratory bench tops, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones, used in aquariums.