Usually in the local quality inspection bureau, you can ask. The appraisal time is very fast. It only takes a few minutes. The charge is not necessarily. It may take 20-30 yuan to identify a single item. That's the most expensive. . Generally, the appraisal is more than ten dollars.
The most basic aspects to identify jadeite are density, refractive index and spectral characteristics. And the comprehensive conclusion is whether it is natural A goods. Mass production is very cheap, and a single one is estimated to cost 50- 100 yuan.
All you have to do is look it up on the website according to the number on the certificate, and then call to ask. It's really worrying. You can weigh it. If the weight is the same as above, there is basically no problem. Some merchants will identify a good one for mass production.
National jade appraisal institutions mainly include China Jade Appraisal Center, Beijing Jade Appraisal Institute and Shanghai Jade Appraisal Center. These institutions have a professional team of jade appraisers and advanced equipment technology, which can accurately identify the authenticity, quality, color, texture and other characteristics of jade.