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