Opal is the traditional birthstone for October. (Pink tourmaline is an alternate).
An opal's unique internal play of color is one of the most fascinating visual effects created by nature. Another attribute of the opal is its beautiful iridescence, known as 'opalescence'. Since the 1890s, Australia has been the primary source of opal.
The Romans thought opal was the most precious and powerful gemstone of all because it contains the colors of all the other gems.
The ancient Greeks believed opals gave their owners the gift of prophecy and guarded them from disease.
Some healers consider the opal to be a stone of inspiration, enhancing creativity and imagination. Opal is also thought to be the gem of hope, purity, and truth.