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necklace pendants wholesale Color-changing wizard among colored gems: Opal

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Opal is also a gemstone with a long history and is called precious opal in mineralogy. From 200-100 BC, people began to use opals as gems. In ancient Rome, opals were not only well-known, but also extremely valuable. Pliny, the ancient Roman naturalist, once gave a very wonderful description of Opal: “Opal has a ruby-like flame, amethyst-like bright purple, emerald-like green, colorful, and a whole, beautiful. The beauty of opal’s colors is no less than the painter’s palette and the flames of sulfur burning.”

The famous literati during the Elizabethan period, Dubai, also wrote a very poetic description: “When nature has finished decorating the flowers, coloring the rainbow, and dyeing the bird’s feathers, she sweeps off the palette. All the paints that came down were cast in the opal stone.”

As described above, the biggest feature of Opal is its color change. Relying on the research of modern electron microscopy technology, it has been revealed that the cause of opal’s color change is the diffraction of light by a diffraction grid composed of innumerable tiny silica balls. The larger spherulites that make up the diffraction grid produce more red light; the smaller spherulites produce more purple light. According to the type and number of colors, the color change can be divided into multi-color, three-color and single-color. “Colorful” refers to the red, žluť, modrý, green, purple or brown color of the same piece of opal when it rotates. Mezi nimi, red is the most rare and precious. “Three colors” means that when the same piece of opal rotates its position, colors such as blue, green and yellow often appear. “Single color” means that when the same piece of opal rotates its position, only one or the main color appears.

V současné době, Australia is the world’s most important producer of opals, and many famous opals are also produced in Australia. In addition to Australia, several famous opals have been found in the Villeyong Canyon in Nevada, USA.

Olympic Austra’s Opal (Olympic Austra’s Opal), discovered in Cooper Baidi, South Australia in 1956, weighs 17000ct, is 28cm long, 12cm high, and 11.5cm wide. It is currently the largest opal found in the world, and it is also the world’s largest opal. One of the most valuable opals, estimated at 2.5 million Australian dollars. The name of this opal gem is derived from congratulations on hosting the Olympic Games in Melbourne, Austrálie. When the gem was discovered, Melbourne was hosting the Olympic Games, hence the name. This opal is now preserved in Melbourne and belongs to Altman & Cherney Ltd.

 

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Začněme : MO@kingjy.com

 

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