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Opal

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description Opal Overview

Opal is a hydrated amorphous form of silica widely utilized as a gemstone in the jewelry industry. It is uniquely characterized by its play-of-color, an optical phenomenon where microscopic silica spheres diffract light into a vibrant, shifting rainbow of hues. Precious opals are classified based on their background color and the patterns of their color flashes. Australia is the world's leading producer of high-quality opals, supplying the majority of the global market for both white and black opal varieties.

help Opal FAQ

What gives an opal its play of colors?

Opal is a hydrated amorphous form of silica that diffracts light into a vibrant play of colors. This unique optical effect is caused by the internal structure of microscopic silica spheres.

Is opal the national gemstone of Australia?

Yes, opal serves as the official national gemstone of Australia. The country produces the vast majority of the world's precious opals, particularly from the famous mining town of Coober Pedy.

Are opals sensitive to water or heat?

Because they contain a significant percentage of water, opals can be sensitive to extreme changes in temperature and dryness. Rapid drying can occasionally cause the stone to crack or craze over time.

What is the difference between a black opal and a white opal?

A black opal features a dark background body tone, which makes the diffracted colors appear much more vibrant and stark. White or light opals have a milky, pale background and generally display softer pastel colors.

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