Fire Opal – Origins
Opal is a mineral is made of silica, the chemical name for silicon dioxide. Today’s opal was formed many millions of years ago in volcanic rocks. Opals formed when silica, carried by water, deposited in voids left by gas bubbles and in rock fractures. Trapped water in these spheres make it so that light passing through the water is broken into the spectrum of colors seen in this precious gem. The effect is akin to light passing through water droplets the sky forming a rainbow. If you have an opal, you possess your own rainbow!
Recently there has been a growing interest in fire opals. This is an opal known not for its play of color, but for its vivid body color, which can be white to yellow, orange or red. Fire opal has some unusual characteristics that are not shared by other opal varieties.
When “fire” is used in referring to gemstones, it is the most important way to describe the presentation of color. Additionally, a fire opal aptly portrays the mixture of reds, oranges and yellows. The fire opal sometimes appears to be a glowing ember, a cool smooth gem,
There is a spectacular variety in the hues. Whether stones have flash, spark, or both – they all have quality.