Know all about Chert and Banded iron formation properties here. All properties of rocks are important as they define the type of rock and its application. Chert and Banded iron formation belong to Sedimentary Rocks.Texture of Chert is Banded, Rough whereas that of Banded iron formation is Banded, Trellis. Chert appears Glassy or Pearly and Banded iron formation appears Layered, Banded, Veined and Shiny. The luster of Chert is waxy and dull while that of Banded iron formation is earthy. Chert is available in black, brown, green, grey, red, white colors whereas Banded iron formation is available in red, reddish brown 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 Banded iron formation are as a touchstone, cemetery markers, creating artwork.