Know all about Chert and Gritstone properties here. All properties of rocks are important as they define the type of rock and its application. Chert and Gritstone belong to Sedimentary Rocks.Texture of Chert is Banded, Rough whereas that of Gritstone is Earthy. Chert appears Glassy or Pearly and Gritstone appears Layered and Foliated. The luster of Chert is waxy and dull while that of Gritstone is dull. Chert is available in black, brown, green, grey, 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 Chert are creating artwork, gemstone, in fire-starting tools, jewelry, to ignite fire, used in flintlock firearms 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.