Know all about Tachylite and Mylonite properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite belongs to Igneous Rocks while Mylonite belongs to Metamorphic Rocks.Texture of Tachylite is Vitreous whereas that of Mylonite is Foliated. Tachylite appears Glassy and Mylonite appears Dull, Banded and Foilated. The luster of Tachylite is resinous while that of Mylonite is shiny. Tachylite is available in black, dark brown colors whereas Mylonite is available in black to grey colors. The commercial uses of Tachylite are cemetery markers, creating artwork and that of Mylonite are creating artwork, gemstone, jewelry.