Ocotober's birthstone is the Opal, called the Queen of Gems. Many people believe this gemstone is unlucky for anyone except those born in October. But, that's a falsehood. There are two theories about the bad luck theory. One is that the opal was outpacing the diamond and it was suspected that the diamond merchants started the rumor. The other reason is found in Sir Walter Scott's novel 'Anne of Geierstein' in 1828 when the heroine's grandmother died when a drop of holy water touched her enchanted opal. Prior to that it was considered a lucky stone.
The Romans believed opals were the symbal of hope and purity. They called the gem "Cupid Paederos" or a beautiful child. Pliny tells of a famous opal coveted by Mark Anthony so he could give it to Cleopatra. The opal, the size of a hazel nut, belonged to a Roman Senator named Nonius. The senator refused all offers. Finally Anthony threatened banishment, which to a Roman was worse than death, but Nomius chose exile and the loss of all his property--rather than surrender his precious opal.
During the Middle Ages, the fire inside an opal was regarded as proof that the Devil lived in the stone. Blonde maidens all wanted a necklace of opals to keep their hair from fading or darkening. For a time, only thieves were said to own opal as it had the power of invisibility.
Today it is given as a symbol of hope, happiness and truth, and the black opal is regarded as a particularly lucky stone. It is believed that when love is conceived in the presence of a black opal, the gem absorbs the emtoion. Thereafter, the fire of that passion glows in the stone. For that reason, the black opal is called the Passion Stone.
Wearing opals is supposed to bring out inner beauty and to enhance psychic and intuitive perception. It helps one's ability to uncover hidden sources of wealth and personal power.
Maybe this is a good lesson to do what you want when it comes to wearing gemstones. Do what you want. Enjoy their beauty.