Each of these fiery opals is unique, one-of-a-kind and a kaleidoscope of colors. Once considered the most powerful gemstone because it possessed all the colors of all the other gemstones. The internal structure of opal makes it diffract light. Made of silica spheres arranged in closely packed planes causes a interference and diffraction of light passing through, an interplay of internal colors.
Opal is the birthstone of October. Some people think it's unlucky for anyone born in another month to wear an opal but that superstition comes from a novel written by Sir Walter Scott, Anne of Geierstein. Most history believes opal to be regarded as one of the luckiest and most powerful gems.