Know all about Gritstone and Mylonite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Mylonite belongs to Metamorphic Rocks.Texture of Gritstone is Earthy whereas that of Mylonite is Foliated. Gritstone appears Layered and Foliated and Mylonite appears Dull, Banded and Foilated. The luster of Gritstone is dull while that of Mylonite is shiny. Gritstone is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors whereas Mylonite is available in black to grey colors. The commercial uses of Gritstone are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo), tombstones and that of Mylonite are creating artwork, gemstone, jewelry.