Characteristics related to grain size of rocks are called as texture. Here you can know more about texture of Banded iron formation and Picrite. Texture of Banded iron formation is Banded, Trellis whereas that of Picrite is Earthy, Rough. Based on the texture of rocks, they are used for various purposes. Get detailed information about Banded iron formation vs Picrite texture, color, appearance and maintenance in the next section.