Know all about Gritstone and Rhyolite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Rhyolite belongs to Igneous Rocks.Texture of Gritstone is Earthy whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Gritstone appears Layered and Foliated and Rhyolite appears Banded. The luster of Gritstone is dull while that of Rhyolite is earthy. 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 Rhyolite is available in grey, white, light black 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 Rhyolite are gemstone, laboratory bench tops, jewelry.