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