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