Know all about Pseudotachylite and Appinite properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite belongs to Metamorphic Rocks while Appinite belongs to Igneous Rocks.Texture of Pseudotachylite is Quench whereas that of Appinite is Porphyritic. Pseudotachylite appears Dull and Soft and Appinite appears Dull, Banded and Foilated. The luster of Pseudotachylite is vitreous while that of Appinite is subvitreous to dull. Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors whereas Appinite is available in black, bluish - grey, brown, dark greenish - grey, green, grey colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Appinite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner.