Opal lore also provided the spirit of truth and the perfection of beauty. In the Middle Ages opal was thought to preserve blond hair. Also opal was thought to lose its luster when its owner died of the plague. The Arabs believed opal to be a gift from heaven that would fall in the flashes of lightening.
Opal's lore is as colorful as the opal itself
Care should be taken to protect it from scratches, sharp blows, household chemicals, and extreme temperature changes. To maintain the brilliance of opal, it should be wiped clean with a soft cloth. Do not use a home ultrasonic machine or jewelry cleaner.
The value of an opal lies in its body color. When opals contain a perfectly aligned grid of silica sphere, they show color. The color's strength depends on background colors and the transparency of the gemstone. Since there are a variety of body colors, there are a variety of different opals.
Some of the most valuable opals are a dark gray to blackish colored body. This is known as black opal. Desired for its brilliant colors, the black opal is only found in Australia's Lightening Ridge and Mintabie. Another valuable opal, the crystal opal, is known for its transparency and the brilliance of its colors. The crystal opal's value lies in the fact that it has many layers of color within the stone.
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