When it comes to opal, it seems that the recognition is not particularly high in China, but it has been very popular in recent years. Many people may know that Australia is the largest production area of ​​Opal, and the natural bacteria still remember the various opal of Australian jewelry counters.
But do you know that China is also producing opal, and the production area is in Hami, Xinjiang.
First of all, we need to know what kind of gems Opal is, Opal, which is the transliteration of its English Opal. The source is Latin, meaning "the beauty of gems." Because Australia is the largest producing area, some people have translated it into Opal. The name is really terrible...
Opal can be understood as the trade name of this gemstone, as the ore, what is its name? Opal is actually an opal.
The main component of the opal is silica. More specifically, most of the gemstones are crystalline, but the opal is an amorphous structure formed by the colloidal precipitation of silica. It has very rich and special color characteristics and optical effects. . Its hardness is only 5.5, which is basically the most vulnerable in the gem. If you buy it, be careful not to fall, and Hetian jade will fall more than it.
The silica inside the opal has a spherical structure, and the primary color is egg white, but it is formed into various colors by mixing with other elements such as iron, calcium, magnesium, copper, etc., and usually has blue, green, yellow, red, black, and the like.
The appearance of opal is translucent to slightly transparent, with a glassy luster or a waxy, gelatinous texture, because it exhibits different optical effects, including both color change and colorless.
The principle of the variable opal is that the size of the silica sphere contained is slightly larger than the wavelength of visible light or half wavelength of visible light, which causes white light to diffract and interfere, showing a full spectrum color from purple to red or some monotonous Spectral color, the surface appears iridescent.
Variable opal usually has several different colors. According to color characteristics and optical effects, it can be divided into three categories: white opal (white opal), black opal (black opal) and fire opal (fire opal). Our familiar opal is a color change, produced in Australia, Mexico and other places, iridescent high-profile erosion.
The opal produced by Hami is the second type of opal: the invariant color opal.
In contrast to the variable color opal, the size of the silica sphere contained is much smaller or far greater than the wavelength of visible light, the optical properties change, the surface does not change color, or there is no obvious iridescence.
The famous category in the invariant color opal is pink opal. The main origin is in South America. What about the pink opal jewelry of Van Cleef & Arpels in the picture above? This opal is very popular with luxury brands.
The appearance of Hami opal is not the same as that of pink opal. The colors are mainly white, red, pink, purple cyan, brown red and chicken yellow, but also colored, but not the kind of iridescence of light refraction, it is its own color. The texture is gelatinous, translucent and looks warm and calm.
Students who are used to changing opal, may not be used to see Hami opal. Its appearance is more like the opal in your impression than the jade. Indeed, some people call it Hami protein jade.
However, the mineral composition indicates that it is not Hetian jade, not agate, or a real opal. It is said that the meat red opal is the unique color of Hami opal, which is more popular.
Our opal design is indeed different in style...
Xinjiang, which has a lot of unique resources, has many unique minerals and gemstones. Everyone may have never heard of Hami opal before, but now it has received more and more attention with the “rise†of the constant color opal.
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