At present, the primary market of jewellery is unevenly heated. Some jewellery categories such as jadeite are seriously declining and transactions are deserted. However, in the secondary auction market, the trading of jade jewellery has not been reduced. Earlier in Beijing Poly Autumn Auction, the jewellery and clocks still auctioned for 336 million yuan to set a record for the same kind of auctions in mainland China, up nearly 25% year-on-year in 2014, including a pair of spring color jade bracelets with a high price of 11.5 million. . In recent years, with the improvement of quality of life and investment demand, more and more people are keen to buy and collect jade. However, the jade market is often mixed with fish. How to identify true and false jade? Experts from the Shanwei Inspection and Quarantine Bureau's Jewelry Identification Laboratory gave us a move. Where is the difference between A, B, and C goods? According to reports, "Jade" refers to a jade-like polycrystalline aggregate formed mainly by jadeite, omphacite and sodium chromite in geological processes. The "hard jade" now mentioned is often equivalent to Emerald. In the market, it is often heard that merchants divide jadeite into A goods, B goods, C goods, etc. What is the difference between these levels? The expert of the Jewelry Identification Laboratory of Shanwei Inspection and Quarantine Bureau told the reporter that Jadeite A: refers to the jadeite that has been preserved in its natural state by color, structure and transparency only by mechanical processing, without any filling and coloring. Jade B goods: refers to the jadeite that has been pickled, bleached, and filled. The method is to treat the inferior jade raw materials through strong acid soaking, weak alkali neutralization, washing, filling, drying, filling, polishing, etc. Increase the transparency of jade. Emerald C goods: refers to the jadeite treated by artificial dyeing. The method is to increase the crack between the crystal particles by heating the jadeite which has no color, and then put it into the dye partially, so that the color enters the jade along the crack. To achieve the effect of beautification. Jade B+C goods: In the process of processing B goods, green pigment is injected at the same time as chemical injection, so that the germplasm and color of jade become very beautiful. Then. Is there any easy-to-learn and practical jade identification technique? Experts say that in the usual life to identify jade, just remember five words is enough: 掂, see, draw, listen, touch. 掂 Weight: The proportion of jade is large. Put the jade in the hand and move it up and down a few times. It feels that there will be a heavy feeling of pressing down. It may be true jade. Emerald 掂 in the hand will be a feeling of lightness, feeling no heavy pressure. This is a good way to identify medium-sized jadeite. Look at the luster: the natural jade surface has a bright glass or grease luster, while the treated emerald surface will be dull or shiny. Drilling hardness: The hardness of jadeite is very high. When sharp objects such as sharp nails or knives are used to scratch or scratch the surface, it will have a slippery feeling without leaving any scratches. The jadeite has been scratched on the surface, leaving a noticeable scratch on the surface. Listening to the sound: Hang the jade with a rope, and then tap it with a glass rod. The natural jade will make a crisp and melodious sound; the sound of the jade knocking will be dull. Touch feeling: natural jade heat transfer, heat dissipation, attached to the face or placed on the back of the hand in a short time has a cold feeling; in addition, the natural jade touches the surface smooth and delicate, and the treated jade surface will have a rough feeling. "Emerald Killer" Discrimination In addition to the common treatment of jade in life, there are many other materials used to imitate jade, the similarity is extremely high, and even people in the industry sometimes confuse, so it is also called "emerald killer", such as: water foam, it The composition is mainly albite, and a small amount of pyroxene minerals and amphibole minerals. The water head of the water foam is very good, and the color is mostly white or grayish white. It is often sold by some unscrupulous merchants as "glass type" jade to those who do not understand jade. Experts pointed out that to distinguish them, the five-character truth rule can also be used.掂 Weight: Jade is 3.33, while water jade is 2.6-2.8, jade is much heavier than water. Directly rubbing by hand, the jade is obviously heavy and more thug; while the water is so light that there is no feeling of sinking. Engraved hardness: water foam jade hardness of 6, can be scratched by steel nails. Listening sound: The hardness and density of jade are much higher than that of water jade. When you tap both, the jade knocking sound is crisp, sweet, hard, crisp, and penetrating. The tapping sound of Shui Moyu is rather dull. Another example is that the green chalcedony, the natural green chalcedony (agate) is mostly impure green, dark green, brown green. The polished surface is smooth, has no orange peel effect, and has no granular structure. The rule of authenticity is to look at the color: although the color of the green chalcedony is similar to that of jade, the color is different. The green chalcedony has a uniform color, uniform color, no obvious color source and color root, and jade has color source and color root in the color form. 掂 Weight: The relative density of chalcedony is 2.65, while the relative density of jadeite is 3.3. Therefore, the texture of chalcedony is naturally lighter than that of jade. The above identification methods are based on the lack of professional equipment and identification knowledge. If consumers still have doubts about the jade they bought, they can send it to the authoritative jewelry identification laboratory. Professional and comprehensive identification. Ningshing Trading Group Inc. is a large-scale trading group with a background of greater than 20 years, established in 1988. It is likewise a large clothing export company. track suits for women, women gym wear, active wear sets Ningbo Ningshing Trading Group Inc. , https://www.ningshingonline.com
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