Know all about Chert and Marl properties here. All properties of rocks are important as they define the type of rock and its application. Chert and Marl belong to Sedimentary Rocks.Texture of Chert is Banded, Rough whereas that of Marl is Earthy. Chert appears Glassy or Pearly and Marl appears Rough and Dull. The luster of Chert is waxy and dull while that of Marl is dull. Chert is available in black, brown, green, grey, red, white colors whereas Marl is available in beige, brown, green, grey, white 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 Marl are creating artwork, soil conditioner.