Know all about Chert and Ganister properties here. All properties of rocks are important as they define the type of rock and its application. Chert and Ganister belong to Sedimentary Rocks.Texture of Chert is Banded, Rough whereas that of Ganister is Clastic, Granular, Rough. Chert appears Glassy or Pearly and Ganister appears Rough. The luster of Chert is waxy and dull while that of Ganister is dull. Chert is available in black, brown, green, grey, red, white colors whereas Ganister 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 Ganister are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.