Know all about Itacolumite and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Itacolumite belongs to Sedimentary Rocks while Rhyodacite belongs to Igneous Rocks.Texture of Itacolumite is Clastic, Granular, Rough whereas that of Rhyodacite is Earthy. Itacolumite appears Rough and Rhyodacite appears Skeletal. The luster of Itacolumite is dull while that of Rhyodacite is greasy to dull. Itacolumite is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors whereas Rhyodacite is available in black to grey, dark greenish - grey colors. The commercial uses of Itacolumite are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones and that of Rhyodacite are cemetery markers, creating artwork.