Know all about Gneiss and Itacolumite properties here. All properties of rocks are important as they define the type of rock and its application. Gneiss belongs to Metamorphic Rocks while Itacolumite belongs to Sedimentary Rocks.Texture of Gneiss is Banded, Foliated, Platy whereas that of Itacolumite is Clastic, Granular, Rough. Gneiss appears Foliated and Itacolumite appears Rough. The luster of Gneiss and Itacolumite is dull. Gneiss is available in black, brown, pink, red, white 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 Gneiss are cemetery markers, jewelry, tombstones, used in aquariums and that of Itacolumite are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.