Know all about Pseudotachylite and Anorthosite properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite belongs to Metamorphic Rocks while Anorthosite belongs to Igneous Rocks.Texture of Pseudotachylite is Quench whereas that of Anorthosite is Foliated, Glassy. Pseudotachylite appears Dull and Soft and Anorthosite appears Layered, Banded, Veined and Shiny. The luster of Pseudotachylite is vitreous while that of Anorthosite is pearly to subvitreous. Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors whereas Anorthosite is available in black, bluish - grey, brown, green, grey, light greenish grey, pink, white colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Anorthosite are creating artwork, curling.