1. Jewelry with appraisal certificate may not be true, because the certificate may be false. Jewelry appraisal certificate is a public trust certificate issued to the authenticity and attributes of rare precious metals, precious stones or jewelry products, which is implemented by professional institutions and professionals who meet the appraisal qualifications.

2. Jewelry with appraisal certificate is not necessarily true. Unscrupulous profiteers can even make fake jewelry, so false certificates are even more important.

3. Not necessarily. Emerald with certificate is not necessarily true. Although when buying jade, in order to have a sense of security and convince consumers, merchants are generally required to issue authoritative jade appraisal certificates.

4. Yes, as long as you find the appraisal certificate on official website, you can be sure that what you bought is genuine, because the appraisal certificate has an independent code.