Know all about Itacolumite and Variolite properties here. All properties of rocks are important as they define the type of rock and its application. Itacolumite belongs to Sedimentary Rocks while Variolite belongs to Igneous Rocks.Texture of Itacolumite is Clastic, Granular, Rough whereas that of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Itacolumite appears Rough and Variolite appears Dull and Soft. The luster of Itacolumite is dull while that of Variolite is not available. Itacolumite and Variolite are available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, 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 Variolite are cemetery markers, creating artwork.