Know all about Gritstone and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Gritstone is Earthy whereas that of Pseudotachylite is Quench. Gritstone appears Layered and Foliated and Pseudotachylite appears Dull and Soft. The luster of Gritstone is dull while that of Pseudotachylite is vitreous. Gritstone and Pseudotachylite are 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 Gritstone are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo), tombstones and that of Pseudotachylite are creating artwork, gemstone.