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