Know all about Gritstone and Tonalite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Tonalite belongs to Igneous Rocks.Texture of Gritstone is Earthy whereas that of Tonalite is Phaneritic. Gritstone appears Layered and Foliated and Tonalite appears Banded and Foilated. The luster of Gritstone is dull while that of Tonalite is subvitreous to dull. Gritstone and Tonalite are available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow 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 Tonalite are cemetery markers, creating artwork.