Metaphysical: Opal is believed to symbolize confidence, purity and serenity. Some believe it can be used to reach the highest spiritual level and increase internal vision. In English speaking countries, opal is considered to bring good luck. 

I have included an "mpeg video" so you can see the stone and it's fire in motion and get a better idea of what you are getting. The video is well worth the small 1/4 megabyte download - about 70 seconds to download on a 56k modem.