Know all about Picrite and Banded iron formation properties here. All properties of rocks are important as they define the type of rock and its application. Picrite belongs to Igneous Rocks while Banded iron formation belongs to Sedimentary Rocks.Texture of Picrite is Earthy, Rough whereas that of Banded iron formation is Banded, Trellis. Picrite appears Rough and Shiny and Banded iron formation appears Layered, Banded, Veined and Shiny. The luster of Picrite is subvitreous to dull while that of Banded iron formation is earthy. Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors whereas Banded iron formation is available in red, reddish brown colors. The commercial uses of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo) and that of Banded iron formation are as a touchstone, cemetery markers, creating artwork.