Know all about Trachyandesite and Phonolite properties here. All properties of rocks are important as they define the type of rock and its application. Trachyandesite and Phonolite belong to Igneous Rocks.Texture of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Phonolite is Granular. Trachyandesite appears Dull and Soft and Phonolite appears Banded and Foilated. The luster of Trachyandesite is earthy while that of Phonolite is greasy to dull. Trachyandesite is available in black, brown, light to dark grey colors whereas Phonolite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Trachyandesite are creating artwork, pottery and that of Phonolite are cemetery markers, creating artwork.