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