Opal is the October birthstone as well as the accepted anniversary gemstone for the 14th year of marriage.
The well known Roman naturalist Pliny described opal as "made up of the glories of most precious gems---the gentler fire of the ruby, the rich purple of the Amethyst, the sea-green of the emerald, glittering together..."
Opal has symbolized hope, innocence and purity through the ages. In the Middle Ages, young fair-haired girls wore opals in their hair to protect its lovely blond color. It was also said to have a beneficial effect on eyesight. It was thought to banish evil spirits and favor children, the theater, amusements, friendships and feelings.
Opal sources are Australia, Mexico, and the United States.