Know all about Nephelinite and Itacolumite properties here. All properties of rocks are important as they define the type of rock and its application. Nephelinite belongs to Igneous Rocks while Itacolumite belongs to Sedimentary Rocks.Texture of Nephelinite is Aphanitic whereas that of Itacolumite is Clastic, Granular, Rough. Nephelinite appears Skeletal and Itacolumite appears Rough. The luster of Nephelinite is vitreous to metallic while that of Itacolumite is dull. Nephelinite is available in black, brown, colourless, green, grey, 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 Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo) and that of Itacolumite are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.