There is a formula: color, transparency, uniformity, shape, percussion, photos, if you add "price", it will be more complete. The principles of each resolution are detailed as follows:
1. color: beautiful color is the first requirement. At present, the most pleasing color is bright green (green tender). Although the top grade color is dark green, it is too dark and makes people feel too dull. Therefore, the top grade dark green is not as high as bright green in price.
Second, transparency: high transparency has a great influence on the value of jade. Transparent jade gives people a cool feeling, while opaque jade, no matter how green and tender the color, gives people a dull feeling and lacks vivid aesthetic feeling. Generally, transparent jade is called "glass seed", translucent jade is called "ice seed" or "Guanyin seed", and opaque jade is called "hibiscus seed" or "taro seed".
Third, uniformity: the uniformity of color is directly proportional to the numerical value. The price difference between the whole piece of green jade and only some green jade is several figures; The distribution position of color also has a great relationship. A little green in the conspicuous place is naturally more pleasing to the eye than the green distributed on the edge.
Shape: Jade is not valued by weight like other precious stones. The value of jade mainly lies in its shape, size and thickness. The bigger and thicker the jade, the more valuable it is. On the contrary, the price of small and thin jadeite will be worse. In addition, its shape is also very important, because most people in China buy jade with the psychology of seeking good fortune and avoiding evil. If the appearance of jade has the shape of a badge, such as fish (more than one year), peach (longevity), coin (making money into treasure) and so on. Will attract buyers and sellers more than ordinary flowers and plants.
5. Knock: This is a special way to choose jade bracelets. When the jade is good, the sound is crisp. If the jade itself has flaws, such as cracks, cavities or local deterioration, the sound will be different. That kind of feeling is like beating defeat, and the sound becomes a "click" sound.
6. Photo: When you pick up the jade and look at it in bright light, you can see the color and flaws of the jade at a glance. Sometimes jade that looks perfect on the surface is found to be flawed. In addition, you can also see the color distribution through the action of taking pictures, and distinguish whether it is natural color through illumination. At the same time, synthetic jade (fake jade) can't escape the checkpoint of "taking pictures". It's just that the skill of "taking pictures" needs experienced people to be mature enough, and ordinary people may not see why.
7. Price: This is a very simple way to distinguish. As the saying goes, "value for money", especially in the jewelry industry. There is absolutely no such thing as buying good goods cheaply. Usually, cheap goods are mostly fakes. So when we buy and sell, we can infer from the price that good jade can't be sold at a low price. So when we saw a beautiful jade and asked about the price, we found it was very cheap. The first reaction is that there is something wrong.
How to distinguish the quality of jadeite from its appearance?
First, because the glass is very brittle and hard, its structure is loosely arranged, and it lacks the density and toughness of jade, so it can't stand strong and high-speed rotary carving. Therefore, high relief and round carving generally cannot be processed on glass.
Second, use a magnifying glass to find bubbles, even if you can only see one, it is glass.
Thirdly, chromium oxide is added into the glass, and the color is close to ruby; Adding cobalt oxide, the color is close to sapphire; Adding chromium oxide and copper oxide, the color is close to emerald. There are many colors. However, its color tone is always relatively thin, lacking the oily and rich feeling of natural jade color. The more difficult varieties are mainly fake jade made of polymer materials. Its color can be adjusted at will, and it is difficult to find bubbles under a magnifying glass. It is said that the original appearance can be displayed on the infrared spectrometer, but the key to visual inspection is to see whether there are natural stone lines on the surface of the instrument, in addition to the general unrealistic destructive inspection, cracking to find the stone section, burning to see its reaction. After all, manual processing is unnatural and will be exposed under a magnifying glass.
● Identification, including new jade and old jade. The identification of new jade focuses on the authenticity of the variety, the quality of the texture and the fineness of the sculptor. Some technical contents have been talked about before. However, the identification of Lao Yu is unusual. In addition to several basic requirements, new jade also needs to know the production age and historical value of jade.
The confirmation of the historical value of jade is based on a clear era. Familiar with the common shapes, characteristic crafts and popular colors of jade in different times. Then refer to the papers on the characteristics of jade in a certain era, and get in touch with each other, and your jade dating level will be rationally improved. At this time, you should contact the real thing as much as possible and correct the parallax between the picture and the real thing in the book.
In addition, the judgment of the times allows a certain span on some jade articles. Because jade tools are precious and not perishable, as a family heirloom, early jade appeared in tombs hundreds of years later, and there are many precedents. The late period of the last era and the early period of the next era are not completely unified in style. Jade has no date, and subtle differences are normal.
Hand-carved, beautifully carved, smooth to the touch, perfect in jade, moist and oily, delicate and meticulous, full of aura, flawless, exquisite in carving and ingenious in conception.
The temperature of jade is relatively low and it is not easy to transfer heat. If you put it in your hand, you can see how the temperature changes slowly.
It is good for me to have the above three points, but it is the opposite to have none at all.
How to distinguish the quality of jade mainly depends on the transparency of crystal. Real jade has strong transparency and oily luster.
Listen, Zhen Yu's voice is crisp, but her voice is dull;
In the test, the real jade scratched the glass, but the jade itself was intact.
Common fake jade includes plastic, stained glass, marble, electrochromic fake jade made of jade powder and crystal with salt water, imitation jade containing nitrate, etc. And their identification methods are different.
Plastic is lighter than jade, and its hardness is poor, so it is generally easy to identify.
It's easy to distinguish between painting and getting off work. As long as you take it under the light or check it in the sun, you will see many bubbles in the glass.
It is difficult to distinguish fake jade by electric color. Its purpose is to electroplate inferior jade and then coat it with a beautiful emerald appearance, so it is easy to mistake it for real jade. At this time, you need to observe carefully. If there are some small cracks with blue in the green, it is fake jade. Because electroplating will leave cracks, experts call it "spider claws". It is also said that if the electro-colored fake jade is put in hot oil, the electroplating color will fade and return to its original color.
Synthetic jade made of jade powder, crystal and salt water is an imitation dark old pit jade. The identification method is simple, that is, their specific gravity is different. The specific gravity of natural jade is 3.3-3.4, while that of synthetic jade is only 2.8. Weigh by hand, or weigh by balance to distinguish between true and false.
Jade imitated with nitrate looks whiter and smoother than jade. The ancients said, "Jade is better than salt, so it must be high." That is, white jade should be as advanced as nitrate. It can be seen that nitrate and jade are difficult to distinguish. However, the facts are different after all. As far as color is concerned, white jade is often blue, and white is rare, while nitrate is pure white. As far as jade is concerned, jade is moist and delicate, as fat as cream. Nitrate is wet, but there are thieves in it. White jade is a natural product, and it is difficult to have a unified structure, including jade ribs and jade flowers. If nitrates are manufactured artificially, there is no such appearance. White jade has a solid texture and no bubbles can be found. No matter how well nitrate is treated, bubbles and pores are often exposed. If you know these items, you won't regard nitrate products as jade articles.
Jade identification
1. Glossy appearance: whether it is translucent or opaque, real jade has a warm luster, and it is normal to have a small amount of impurities or cotton-wool patterns inside; Fake jade articles are dry and dull, and some have bubbles.
② Hardness measurement: Carve and scrape with a knife, leaving no trace of real jade.
(3) The proportion of jade: real jade feels heavy, while fake jade floats lightly.
(4) Listening: hanging jade with a thread and knocking with a hard object, the authentic sound is crisp and pleasant, and the aftertaste is melodious; The fake one is dull and dry.
⑤ Look at the fracture surface: With a magnifying glass of 10 times, the fracture surface of real jade is uneven, and a fine structure can be seen; Fake jade has a neat and shiny fracture, often a glass imitation, and its fracture structure is rough and waxy.
Speaking of jade, we know that "white marble" is white and crystal clear marble, so we can't simply say that "real jade" is valuable. As for what jade you are, you can't judge without pictures.