Know all about Argillite and Gritstone properties here. All properties of rocks are important as they define the type of rock and its application. Argillite and Gritstone belong to Sedimentary Rocks.Texture of Argillite is Clastic, Polished whereas that of Gritstone is Earthy. Argillite appears Rough and Dull and Gritstone appears Layered and Foliated. The luster of Argillite is waxy and dull while that of Gritstone is dull. Argillite is available in dark grey to black, pink, red, 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 Argillite are fire resistant, used to manufracture paperweights and bookends 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.