Know all about Pseudotachylite and Chert properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite belongs to Metamorphic Rocks while Chert belongs to Sedimentary Rocks.Texture of Pseudotachylite is Quench whereas that of Chert is Banded, Rough. Pseudotachylite appears Dull and Soft and Chert appears Glassy or Pearly. The luster of Pseudotachylite is vitreous while that of Chert is waxy and dull. Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors whereas Chert is available in black, brown, green, grey, red, white colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Chert are creating artwork, gemstone, in fire-starting tools, jewelry, to ignite fire, used in flintlock firearms.