Know all about Tachylite and Itacolumite properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite belongs to Igneous Rocks while Itacolumite belongs to Sedimentary Rocks.Texture of Tachylite is Vitreous whereas that of Itacolumite is Clastic, Granular, Rough. Tachylite appears Glassy and Itacolumite appears Rough. The luster of Tachylite is resinous while that of Itacolumite is dull. Tachylite is available in black, dark brown 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 Tachylite 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.