Know all about Mylonite and Gneiss properties here. All properties of rocks are important as they define the type of rock and its application. Mylonite and Gneiss belong to Metamorphic Rocks.Texture of Mylonite is Foliated whereas that of Gneiss is Banded, Foliated, Platy. Mylonite appears Dull, Banded and Foilated and Gneiss appears Foliated. The luster of Mylonite is shiny while that of Gneiss is dull. Mylonite is available in black to grey colors whereas Gneiss is available in black, brown, pink, red, white colors. The commercial uses of Mylonite are creating artwork, gemstone, jewelry and that of Gneiss are cemetery markers, jewelry, tombstones, used in aquariums.