Know all about Chalk and Banded iron formation properties here. All properties of rocks are important as they define the type of rock and its application. Chalk and Banded iron formation belong to Sedimentary Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Banded iron formation is Banded, Trellis. Chalk appears Soft and Banded iron formation appears Layered, Banded, Veined and Shiny. The luster of Chalk is dull while that of Banded iron formation is earthy. Chalk is available in grey, white, yellow colors whereas Banded iron formation is available in red, reddish brown colors. The commercial uses of Chalk are alumina refineries, creating artwork, drawing on blackboards, gymnasts, athletes and mountain climbers use for grip, in aquifers, paper industry, production of lime, raw material for manufacture of quicklime, slaked lime, soil conditioner, whiting, whiting material in toothpaste, paint and paper and that of Banded iron formation are as a touchstone, cemetery markers, creating artwork.