Hetian jade is a gem of the Chinese nation and has been nominated as China's “national stoneâ€. As early as the Neolithic Age, the ancestors of the Kunlun Mountains discovered Hetian jade and transported and communicated to the East and West as a treasure and friendship medium, forming the “Jade Road†of the oldest Hetian jade transportation channel in China. The predecessor of the "Silk Road". In China, Hetian jade is distributed in the Kunlun Mountains in the south of the Tarim Basin. From the west of the Tashkurgan County in the Kashgar region, the Angatatag and the Alashan Mountain, the Hetian jade metallogenic belt is more than 1,100 kilometers long. Good Hetian jade seed material, shape, whiteness, skin color and moisture are good enough to be called fine. The seed material is formed after thousands of years of grinding and scouring in the riverbed. It is really hard to get a piece of seed with excellent shape and less sputum. The price is also high in the market. As the saying goes, jade is not a weapon. It is not very suitable for use in a very beautiful seed jade. If it exists, it can be carved into a variety of beautiful devices. The same thing can be done a lot. However, for a beautifully shaped seed, it is recommended to retain the original shape of the material in the form of gold or silver. Natural, without carving, is a beautiful pendant. This kind of good material is better than any masterpiece. Ancient China attached great importance to the color of Hetian jade. It is not only an important symbol of quality, but also attached to a certain ideology. The ancients may be influenced by the Five Elements. According to the Quartet and the Central Committee, the five colors of jade are distributed, the east is green, the west is white, the south is red, the north is black, and the center is yellow. In ancient times, the five colors of cyan, red, yellow, white and black were positive colors, and the others were intercolored. Thus jade is also divided into five colors. The color of jade contained in Wang Yi's "Jade Theory" is: "Red as a cockscomb, yellow as steamed chestnut, white as a cut-off fat, ink as pure paint, and a jade symbol. And sapphire has nothing to say. Today's white people often have, There are black, but there is no such thing as the yellow. This means that jade has five colors of white, cyan, black, red and yellow, and is usually cyan and white. Fu Heng and other 纂 "Western Maps" said that the jade from the Yuyu River is: 绀, yellow, green, blue, white color. Li Yuan’s "Western Regions Wen Cun" said that the jade produced by Yarkant is different in color, white, yellow, red, black and blue. The above said that there are five colors of jade, but the Ming Dynasty scientist Song Yingxing believed that jade is only white and green. He said in "Heavenly Creations": "Where jade is only white and green, green Chinese famous dishes Jade, its red jade topaz said that it is a stone scorpion, the price is not jade, but it is not jade." The ancients said that the jade color is not the same, after our investigation and jade jade actually only white, blue, ink, yellow Four-color. In addition, in some areas of the Kunlun Mountains and the Altun Mountains, jasper is also produced, which is also a nephrite. The genesis is related to ultrabasic rocks, similar to the Canadian Jasper and the Xinjiang Manas Jasper, but it can also be attributed to the Saitama range. Different colors of jade, the quality is not the same, such as "Xinjiang Gegu Theory, Treasures" said: "Jade out of the Western Region in the country, there are five colors ... where the utensils are white, yellow jasper is also expensive." China White has been a symbol of purity since ancient times. "Han Shu Heng Heng": "Shows white people." So people love white. White jade is not only white in color, but also in good texture. Deep people love it and are listed as treasures. According to the color appearing in Hetian jade, it can be divided into five color systems: 1. White series: There are also many varieties of white jade in Hetian jade: white fat white; snow white, pear white, ivory white, white belly, brown rice white, chicken bone white and so on. Among them, it is best to use fine and clean sheep's fat white. In the history, it is called the essence of white jade, jade, jade king. 2, green series: in the white jade, sapphire often light green white, light green, gray green, green to dark green in jasper. From the white jade, sapphire, jasper in order, as the color deepens, the content of iron oxide is increased, and jasper generally contains elements unique to ultrabasic rocks such as chromium, nickel, and diamond. In addition to tremolite, the gems in the jasper begin to appear as erectite or tremolite containing more iron. Therefore, different shades and shades of green are presented. Black spots and jade are obvious. Contains a small amount of impurity minerals. 3, yellow series: Topaz has yellow, beige, beeswax, maroon yellow, okra yellow, sunflower yellow, egg yolk, half-color yellow, yellow box yellow, etc., among which chestnut yellow, honey wax yellow. Other yellows are second. The yellow color is yellow and delicate, the thicker and brighter the more precious, its precious value is not under the sheep fat jade, and it is rarer than the sheep fat jade. Mostly the color caused by iron oxide. 4. Black series: The jade (black jade) in Hetian jade is grayish black and black. Black is sometimes unevenly dyed, black spots, clouds, pure black. High quality black as pure paint. It is precious because it is rare. Ink jade is also known as black jade, or jade in black jade, and jade in white jade and white jade. The reason for coloration is mainly due to the presence of microscale flake graphite impurities between the tremolite particles. The degree of black is strong and weak, and the depth distribution is different. 5, brown red series and other colors: Hetian jade has a color like brown sugar and is called sugar jade. Mostly purple, maroon, blood red (rare). Limonite is distributed between the tremolites in the sugar jade, indicating that the sugar jade is red or brownish yellow due to the oxidation of the tremolite by iron oxide. Containing manganese oxide can be purple-red. To distinguish the quality of Hetian jade: First of all, look at the texture, the most important is the delicateness and purity, with no flaws, bright colors, thick feelings, strong maturity; secondly look at the shape and skin color; the last is Look at the whiteness. The key to the quality of a piece of jade is texture.
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