Opal Birthstone The colorful gemstone! October's beautiful birthstone is associated with love and passion. A special stone that can be found in many colors. But also many colors can be seen in a single opal. Opal has been wrongfully accused of bringing bad luck just because it is a sensitive gemstone and difficult to work with. But it is actually believed to bring good luck to the ones born in October! Many also believe that the opal has the power to protect the wearer and bring good health. Whatever your reasons are a delicate opal necklace is a keeper! Simple and sophisticated, a gemstone to make your day full of colors!