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