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