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