Know all about Comendite and Gritstone properties here. All properties of rocks are important as they define the type of rock and its application. Comendite belongs to Igneous Rocks while Gritstone belongs to Sedimentary Rocks.Texture of Comendite is Porphyritic whereas that of Gritstone is Earthy. Comendite appears Foliated and Gritstone appears Layered and Foliated. The luster of Comendite and Gritstone is dull. Comendite is available in blue, bluish - grey 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 Comendite are cemetery markers 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.