Know all about Itacolumite and Icelandite properties here. All properties of rocks are important as they define the type of rock and its application. Itacolumite belongs to Sedimentary Rocks while Icelandite belongs to Igneous Rocks.Texture of Itacolumite is Clastic, Granular, Rough whereas that of Icelandite is Aphanitic to Porphyritic. Itacolumite appears Rough and Icelandite appears Dull and Soft. The luster of Itacolumite is dull while that of Icelandite is vitreous. 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 Icelandite is available in bluish - grey, grey, pink, yellow 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 Icelandite are cemetery markers, creating artwork.