Know all about Gritstone and Felsite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Felsite belongs to Igneous Rocks.Texture of Gritstone is Earthy whereas that of Felsite is Arborescent Patterned, Vitreous. Gritstone appears Layered and Foliated and Felsite appears Layered, Banded, Veined and Shiny. The luster of Gritstone is dull while that of Felsite is vitreous. 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 Felsite is available in black, blue, brown, green, orange, red, tan, 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 Felsite are mirror, jewelry.