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