Know all about Argillite and Banded iron formation properties here. All properties of rocks are important as they define the type of rock and its application. Argillite and Banded iron formation belong to Sedimentary Rocks.Texture of Argillite is Clastic, Polished whereas that of Banded iron formation is Banded, Trellis. Argillite appears Rough and Dull and Banded iron formation appears Layered, Banded, Veined and Shiny. The luster of Argillite is waxy and dull while that of Banded iron formation is earthy. Argillite is available in dark grey to black, pink, red, white colors whereas Banded iron formation is available in red, reddish brown colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Banded iron formation are as a touchstone, cemetery markers, creating artwork.