Know all about Pseudotachylite and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite belongs to Metamorphic Rocks while Tachylite belongs to Igneous Rocks.Texture of Pseudotachylite is Quench whereas that of Tachylite is Vitreous. Pseudotachylite appears Dull and Soft and Tachylite appears Glassy. The luster of Pseudotachylite is vitreous while that of Tachylite is resinous. Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Tachylite are cemetery markers, creating artwork.