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Some knowledge about jewelry
The four diamond processing centers in the world are: (1) Small-particle diamond processing center-Mumbai, India; (2) A large diamond processing center-new york, USA; (3) Antwerp, Belgium, an exquisite diamond processing city; (4) Fine small diamond processing center-Tel Aviv, Israel. The five major gem processing centers in the world are: (1) World Gem City-Idar, Germany-Burstein, Austria; (2) Japur, India, the rough processing city of jadeite; (3) Sapphire City-Bangkok, Thailand; (4) Emerald and "Four Emperors and One Empress" processing center-Hong Kong; (5) The middle and low grade gem processing city-Jiafu, Japan.

The English name jadeite of jadeite comes from the abbreviation of Spanish plcodejade, which means a gem worn on the waist. In the16th century, jade was considered as a gem that could treat low back pain and kidney pain. Jadeite is a kind of pyroxene aggregate mainly composed of jadeite minerals, and its real scientific name is jadeite. It is called Emerald because it was transported from Myanmar to China through the second Silk Road in the early Qing Dynasty. Hetian jade produced in China at that time was called Emerald. When the jadeite from Myanmar flows into Yunnan, it is distinguished that Hetian jade, which is not from China, is jadeite, which is called non-jadeite, that is, it doesn't mean China jadeite. With the passage of time, Cui Fei has become an emerald. Because of its uneven color, sometimes it is accompanied by red and green groups on the light color foundation, and the beauty of color is like the red-feathered Philip bird and the green-feathered kingfisher. Therefore, it is not appropriate to use beautiful bird names to represent beautiful jade. Jade is a precious gem and has the reputation of being the king of jade. Emerald and emerald were listed as birthstones in May, which are symbols of luck and happiness. In the east, especially in Japan, Southeast Asian countries and Hong Kong and Macao, it is deeply loved by people. In recent years, there has been a gem craze in China, and jadeite has become the best gem. Emerald was originally the name of a bird in China. Jade is a bird with red feathers, and Cui is a bird with green feathers. Later, the two words gradually merged, especially a kind of brown bird in blue and green. The reason why jadeite turns to beautiful jade refers to a kind of jadeite containing sodium aluminosilicate, because the color of this jadeite is uneven, sometimes accompanied by red and green color blocks on a light-colored foundation, and its color is like a beautiful jade bird. Emerald has a Mohs hardness of 6.5-7, good toughness, and is not easy to break after being hit hard, and some even exceed the compressive strength of steel. Emerald has many colors. Jade with pure chemical composition is white. When the composition contains metal pigment ions, it appears green, red, purple, yellow, gray and black. The red one is called "Fei" and the green one is called "Cui". Of all the colors, the most precious and valuable is gorgeous green. However, if there are four colors of red, green, purple and yellow on a piece of jade, it represents happiness, wealth, longevity and happiness, then it is a very precious and rare jade. The origin of jadeite is mainly in Myanmar, and more than 90% of jadeite in the world is produced in this country. Emerald has bright colors, fine texture, high hardness and good toughness, and can be used for carving jewelry and various handicrafts. About the Ming Dynasty, jadeite was favored by people when it was introduced to China from Myanmar. Jade carvings abound. There are jade cucumbers and exquisite pagodas among the people, and the jade in the palace is even more extraordinary, showing the unique skills of craftsmen. According to records, there are many jadeite products among the funerary objects of Empress Dowager Cixi in Qing Dynasty: 2 jadeite watermelons, red flesh and green skin, black silk and white seeds, 4 jadeite melons, 2 white flesh and yellow seeds, and 2 green flesh and yellow flesh, worth 6 million silver; There is a lotus leaf with a handle on the top of the head, and the leaves are covered with blue veins, which is natural and weighs 23 taels and is worth 2.85 million taels of silver. In addition, there are 10 emerald peaches, which are green in body and pink in tip, just like real peaches; There are two emerald green vegetables, a green slug in the heart and two yellow wasps on the leaves, which are lifelike. First, the jadeite with positive, strong, sunny and uniform color in the old pit can become the old pit. Old pits are mainly used to describe the color of jadeite. This kind of thick green is evenly distributed, with high concentration, bright color, generally delicate texture and not necessarily very transparent. If the transparency is high and the moisture is sufficient, the color and texture of jadeite will look better. Experts call it Qi Ying, which is bright and dazzling, and will become the old pit glass variety. Laokeng glass can be said to be the title of the highest grade jadeite. Of course, the old pit glass itself has a relatively high and low quality. Second, green species with white background are widely distributed species of jadeite in Myanmar. It is characterized by fine texture, often fiber structure, generally white background, of course, sometimes there are some impurities. The green color of green species with white background is more vivid, because the white background is greener and whiter, and the green part is mostly round, which is different from the green species. Most of the green species on white background are opaque, that is, experts say that water is insufficient. They think this is a new variety. Third, the flower green species refers to a kind of jade, and its green distribution is pulsed, but it is very irregular. Its background color may be light green or other colors, and its texture may be coarse or fine. For example, the flower green at the bottom of the bean has a rough structure and is called the bottom of the bean. Its irregular colors are sometimes densely distributed, or they may be sparse, dark or light. Therefore, this kind of jadeite is called flower green species, and the color distribution of jadeite is mostly. So it is not surprising that there are so many kinds of flowers and greens. In fact, the flower green species can be further divided into: bean bottom flower green, horse tooth flower green, oil bottom flower green ... Fourth, oil green species refers to a kind of jade with deeper green. The color is not pure green, but gray or blue, which is not bright enough. It can also be said that the color is very dull. Its color can range from light to dark, and its transparency is generally good. Southerners generally don't like oil green species, but they are more popular in the north.