Jade with identification certificate must be real jade. But there is no quality basis. Certificates are not the basis. These data only determine what the material of jade is, and are not the basis for valuation. In the process of identification, several appraisers will use instruments to test respectively, and then give the results of comprehensive evaluation.
Therefore, when buying jade ornaments and handicrafts, if you don't have the ability to identify, you'd better not trust the "identification certificate" easily. The most important thing is to buy from regular shopping malls and jewelry stores.
At present, the most authoritative appraisal institution in China is ngtc, and there are many inspection institutions in other provinces, cities and places, which are not as authoritative as NGTC.
Hello, first of all, it depends on whether the institution on the appraisal certificate is a national inspection unit. This website can be found at any time. Besides, you're worried about selling dog meat. In fact, the quality data on the certificate is very important. Physical measurement is based on g, accurate to two decimal places.