Know all about Claystone and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Claystone belongs to Sedimentary Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Claystone is Clastic whereas that of Pseudotachylite is Quench. Claystone appears Rough and Dull and Pseudotachylite appears Dull and Soft. The luster of Claystone is dull while that of Pseudotachylite is vitreous. Claystone is available in black, blue, brown, green, grey, orange, red, white, yellow colors whereas Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Claystone are pottery and that of Pseudotachylite are creating artwork, gemstone.