Know all about Trachyte and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Trachyte and Tachylite belong to Igneous Rocks.Texture of Trachyte is Aphanitic to Porphyritic whereas that of Tachylite is Vitreous. Trachyte appears Banded and Tachylite appears Glassy. The luster of Trachyte is metallic while that of Tachylite is resinous. Trachyte is available in black, brown, dark greenish - grey, green, grey, light to dark grey, white colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Trachyte and Tachylite are cemetery markers, creating artwork.