1. The jadeite appraisal certificate is issued by the appraisal institution. If you are in doubt about buying jade, you can go to the appraisal institution in your province and city for monitoring, and the cost is about tens to hundreds of yuan.
2. The certificate of Emerald is issued by strict standard procedures. Generally, the authoritative appraisal institutions of national qualification certification do instrument appraisal for jadeite submitted for inspection. Common identification items include: density, infrared spectrum analysis, refractive index, magnification inspection, etc.
3. Check the qualifications of the assessment agencies; After you get the jade appraisal certificate, you must first check whether the appraisal institution marked on the certificate has the appraisal qualification. You can query whether the organization is true and effective through the network.
4. Look at the signs: there will always be several signs with English abbreviations at the top of the real appraisal certificate, such as CMA, CAL and CNAS, among which CMA is necessary and is the basic requirement of national laws for testing and inspection institutions. Otherwise, the certificate is invalid.
How to identify the authenticity of jade bracelets?
1, the color of the real jade bracelet is natural, and the color of the fake jade bracelet is only available after bleaching and dyeing with bad jade or glass. The surface color of the jade bracelet is very good, but the interior color is very few. After all, bleaching and dyeing are only on the surface, and it is impossible to completely penetrate into the jade.
Generally speaking, the authenticity can be distinguished by identifying the jade bracelet, color root, texture and sound. Seeing the color root is to turn on the flashlight and hold it at the jade bracelet. If the color inside the jade bracelet is very strong, the color becomes lighter from the inside out. Or the surface of the bracelet has the texture like orange peel, which means the jade is real.
3, look at the luster, the real jade bracelet is glass, the fake jade bracelet is mostly wax, and the luminosity and smoothness are poor. The simple identification of jade bracelets can be observed with the naked eye, first look at the luster of natural light.
4. Observe the color of the jade bracelet carefully. If the color of the jade bracelet is natural, it is a natural jade bracelet. The color of jadeite bracelets, especially green, is distributed in various forms, such as dots, veins, filaments and sheets, accompanied by colored roots. This is one of the effective features to identify jade bracelets.
Where to recheck after buying jade?
Jade re-inspection can choose the quality supervision and testing center of jewelry and jade, the jade jewelry appraisal center at or above the provincial level, the jade inspection agency of the jade wholesale distribution center or the official jade appraisal website recognized by the state.
Re-inspection of jadeite certificate is to change the certificate of purchased jadeite to another place for secondary inspection. Generally, when buying jadeite, merchants will issue jadeite appraisal certificates, but ordinary consumers sometimes don't trust the certificates provided by merchants, so some consumers will take them to other places for re-inspection.
Jade is generally sent to the local jade quality inspection center for inspection, and the identification certificate and jade are taken to the inspection center for inspection. If it is early, the results can be produced on the same day and the structure can be produced three days later. Regular jade testing institutions are recognized by national authorities, and the accuracy of appraisal results is particularly guaranteed.
Go to a local legally qualified testing and appraisal institution for repeated testing. Re-inspection refers to repeated inspection. The products are jadeite products, and there is no problem in repeated testing by any legally qualified testing and appraisal institution in China. Expressed confidence in product quality.
If you can identify the authenticity of jade, you can also test it yourself. Jade is the hardest of all jade, and its Mohs hardness is 5-7, which is not available in other jade. When scraping the surface of jadeite with a knife, there will be no trace, which is a common method to identify jadeite.
The place where jadeite is identified wants to identify jadeite. For beginners, the simplest and most effective method is to send jadeite to the local jadeite quality inspection center for inspection, and at the same time send the jadeite identification certificate to the quality inspection center for identification.