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