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