Know all about Andesite and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Andesite belongs to Igneous Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Andesite is Aphanitic to Porphyritic whereas that of Pseudotachylite is Quench. Andesite appears Dull and Soft and Pseudotachylite appears Dull and Soft. The luster of Andesite and Pseudotachylite is vitreous. Andesite is available in bluish - grey, grey, pink, yellow colors whereas Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Andesite are commemorative tablets, creating artwork and that of Pseudotachylite are creating artwork, gemstone.