Know all about Mudstone and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Mudstone belongs to Sedimentary Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Mudstone is Clastic whereas that of Pseudotachylite is Quench. Mudstone appears Rough and Dull and Pseudotachylite appears Dull and Soft. The luster of Mudstone is dull while that of Pseudotachylite is vitreous. Mudstone 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 Mudstone are creating artwork, pottery and that of Pseudotachylite are creating artwork, gemstone.