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