Know all about Gritstone and Andesite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Andesite belongs to Igneous Rocks.Texture of Gritstone is Earthy whereas that of Andesite is Aphanitic to Porphyritic. Gritstone appears Layered and Foliated and Andesite appears Dull and Soft. The luster of Gritstone is dull while that of Andesite 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 Andesite is available in bluish - grey, grey, pink, 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 Andesite are commemorative tablets, creating artwork.