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