Know all about Banded iron formation and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Banded iron formation and Greywacke belong to Sedimentary Rocks.Texture of Banded iron formation is Banded, Trellis whereas that of Greywacke is Clastic. Banded iron formation appears Layered, Banded, Veined and Shiny and Greywacke appears Dull. The luster of Banded iron formation is earthy while that of Greywacke is dull. Banded iron formation is available in red, reddish brown colors whereas Greywacke 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 Banded iron formation are as a touchstone, cemetery markers, creating artwork and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.