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