Know all about Trachyandesite and Variolite properties here. All properties of rocks are important as they define the type of rock and its application. Trachyandesite and Variolite belong to Igneous Rocks.Texture of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Trachyandesite appears Dull and Soft and Variolite appears Dull and Soft. The luster of Trachyandesite is earthy while that of Variolite is not available. Trachyandesite and Variolite are available in black, brown, light to dark grey colors. The commercial uses of Trachyandesite are creating artwork, pottery and that of Variolite are cemetery markers, creating artwork.