Existing jadeites A, B and C put these three jadeites under fluorescent lamps and observe their color changes. A and c remain unchanged, and b fluoresces and turns white. C is dyed, so its color is distributed along the crack and uneven. It is visible to the naked eye after careful observation. The specific explanation is as follows: A is jade, natural jade, without chemical treatment, the color and fruit are natural. B is jadeite, bleached and glued jadeite, washed and glued with strong acid. Soaking and cleaning in strong acid is helpful to improve the transparency and color of jadeite. C jadeite, dyed jadeite, is artificially colored jadeite, usually washed with strong acid, glued and artificially colored with organic dyes or inorganic dyes. Extended information: Take off the flashlight and other methods to identify jadeite. Cuixing. "Cuixing" can't be used as the characteristic sign of natural jadeite. In other words, what is not "green" is not necessarily natural jade. Of course, if you show green, it's easier to tell. Therefore, the more high-end things have fewer defects, the easier it is to make fakes. With the continuous improvement of counterfeiting technology, the discovery of new jade species and its entry into the jade market, the knocking sound can no longer be used as the basis for judging jadeite A and B goods. Some jade sellers often show that they are natural jade by tapping two bracelets gently and making a crisp "clang". The striking sound of emerald B with obvious filler is slightly dull. However, it is not necessarily natural jadeite that makes a "jingling sound", but amphibole sodium jade (such as Myanmar's "ink painting" jade) also has this sound. At present, some B goods on the market can also make a crisp "clang". Network structure. Emeralds rinsed with strong acid generally have obvious pores and network structure. Natural jadeite will also produce obvious pores and reticular structures under stress and weathering, which is often difficult to distinguish from reticular cracks caused by acid corrosion. The view that "commodity B must observe cracks, pits and pits in the net" may not be appropriate. The natural pores of jadeite can be filled with zeolite and clay minerals in the later stage. Mineral powder or polishing powder can also be filled in the process of cutting, grinding and polishing. These fillers are not B goods and are easy to identify. Appraisal certificate Generally speaking, the appraisal certificate of natural jadeite (A goods) will be marked with jadeite, natural jadeite, jadeite (A goods) and jadeite (natural). , and products B and C will be marked with jade (treatment) or jade (optimization). The appraisal certificates issued by various institutions should be credible, but some profiteers will issue fake appraisal certificates or genuine fake jade articles. For example, for some unremarkable daily necessities with no obvious characteristics, the appraisal certificate will be repeatedly processed with A products, and counterfeit products with similar appearance will be distributed and sold together. There are also some appraisal institutions that issue irresponsible certificates in order to make profits and relax standards. These still need you to analyze specific problems and look at various goods certificates. Knowing more will reduce the chance of being cheated. National Inspection Certificate: National Jewelry Quality Supervision and Inspection Center is a national jewelry quality inspection institution authorized by law, and is recognized by the qualification accreditation laboratory of the national product quality supervision and inspection institution. It is the authoritative organization of jewelry inspection in China, and has been designated as the national scientific and technological achievements appraisal institution, import and export commodity inspection laboratory and commodity designated laboratory of China Consumers Association. The national inspection and certification style is unified nationwide, networked nationwide, and has no regional characteristics.