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