The October Birthstone is Opal The birthstone for October is Opal and the October birthstone color is Multi-Color, White or Pink. The alternative October birthstone is Pink Tourmaline and in fact both Opal and Tourmaline are the official birthstones for this month. The Zodiac birthstones for Libra (Sep 24 – Oct 23) include Opal, Peridot … Continue reading October Birthstone Color and Flower & more October Birthday Symbols