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