Know all about Troctolite and Gritstone properties here. All properties of rocks are important as they define the type of rock and its application. Troctolite belongs to Igneous Rocks while Gritstone belongs to Sedimentary Rocks.Texture of Troctolite is Phaneritic whereas that of Gritstone is Earthy. Troctolite appears Veined and Shiny and Gritstone appears Layered and Foliated. The luster of Troctolite is not available while that of Gritstone is dull. Troctolite is available in dark grey to black 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 Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones 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.