Know all about Itacolumite and Phonolite properties here. All properties of rocks are important as they define the type of rock and its application. Itacolumite belongs to Sedimentary Rocks while Phonolite belongs to Igneous Rocks.Texture of Itacolumite is Clastic, Granular, Rough whereas that of Phonolite is Granular. Itacolumite appears Rough and Phonolite appears Banded and Foilated. The luster of Itacolumite is dull while that of Phonolite 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 Phonolite is available in brown, buff, cream, green, grey, pink, white 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 Phonolite are cemetery markers, creating artwork.