Know all about Rhyodacite and Banded iron formation properties here. All properties of rocks are important as they define the type of rock and its application. Rhyodacite belongs to Igneous Rocks while Banded iron formation belongs to Sedimentary Rocks.Texture of Rhyodacite is Earthy whereas that of Banded iron formation is Banded, Trellis. Rhyodacite appears Skeletal and Banded iron formation appears Layered, Banded, Veined and Shiny. The luster of Rhyodacite is greasy to dull while that of Banded iron formation is earthy. Rhyodacite is available in black to grey, dark greenish - grey colors whereas Banded iron formation is available in red, reddish brown colors. The commercial uses of Rhyodacite are cemetery markers, creating artwork and that of Banded iron formation are as a touchstone, cemetery markers, creating artwork.