Know all about Variolite and Itacolumite properties here. All properties of rocks are important as they define the type of rock and its application. Variolite belongs to Igneous Rocks while Itacolumite belongs to Sedimentary Rocks.Texture of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Itacolumite is Clastic, Granular, Rough. Variolite appears Dull and Soft and Itacolumite appears Rough. The luster of Variolite is not available while that of Itacolumite is dull. Variolite is available in black, brown, light to dark grey colors whereas Itacolumite is 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 Variolite are cemetery markers, creating artwork and that of Itacolumite are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.