As the king of jade, jade has always been the darling of the jewelry market. In some domestic and foreign auctions, it has repeatedly shot high prices. However, some jade treatments, such as the jade B goods or jade B+C goods commonly found on the market, are often used to imitate high-quality jade, causing confusion to the market and causing great trouble to consumers. So let us answer the questions of Jade A, B, and C for everyone today. First of all, the most intuitive is the luster of jade. Natural A-carved jade can usually achieve glass luster (a few can reach strong glass luster) as long as it is polished normally. However, the pickled bleached jade has a lot of acid etch on the surface, so the B jade tends to have a waxy luster after polishing. Under the reflected light source, there are obvious differences, but the identification also needs to be based on long-term practical experience. Natural emerald bright glass luster B goods emerald dim gloss Secondly, a ten-fold magnifying glass can be used to observe whether there is acid etching on the surface. Natural A-carved jade may have micro-corrugation (also known as the "orange peel effect") due to the difference in hardness of its constituent minerals, which is characterized by slight fluctuations in the surface. The pickled and bleached B-carved jade, because the hardness of the filled organic rubber is much smaller than the hardness of the jadeite mineral, it is easily thrown away during polishing to form a large number of small depressions, which are usually called acid etching. . By magnifying the observation, the grooved mesh-like concave line having the surface is seen. It is also because of the existence of acid etching, which affects the surface gloss of the treatment of jade, resulting in the treatment of the B jade gloss compared with the natural jade, it is worse, it appears dim. B goods jade etched Under transmitted light, we can observe whether there are secondary colors (red, yellow, brown, etc.) in the jadeite, and whether they have secondary tones. Natural A-car jade often has secondary colors. A small number of good quality jadeites, although not having secondary colors, also have a secondary yellow hue under transmitted light. The treated jade is usually sub-colored under transmitted light and has no yellow hue. This is because the treatment of jadeite is usually acid-washed, and during the pickling process, the iron oxide is washed, resulting in no secondary hue and secondary color. Of course, some of the treatment of jade may also be dyed, that is, the jade B+C goods commonly known in the market, it is possible to re-dye the color of the last birth, which requires special attention. The secondary color of jade In addition, UV fluorescent lamps can also be used as an auxiliary tool to check whether jadeite has been treated. In general, natural A-carved jadeite usually does not have fluorescence. If it contains altered minerals such as calcite and kaolin, it may produce partial fluorescence at the location of these minerals, or may be waxy residue due to optimization of boiling wax. Fluorescence occurs in the place. However, it does not have a fluorescent phenomenon as a whole. However, part of the B-Jadeite, due to its filled glue, causes it to exhibit overall fluorescence under ultraviolet light. However, it should be noted that whether the B-car jade has fluorescence depends on the organic glue it fills. If the glue is not fluorescent, the entire B-car jade has no fluorescence. In the market, sometimes ultraviolet fluorescent lamps are not convenient to carry, and violet lamps can also be used as an alternative.
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