Usually jewelry has a one-to-one "Jewelry and Jade Appraisal Certificate", but this does not mean that there is absolutely no problem. Some "authoritative appraisal certificates" can be forged. For example, a fake merchant imitates the website of an authoritative authentication institution and enters his certificate number, so that the fake certificate can also find the authentication information in the "official website" he gave you. In addition, there are some small appraisal institutions that live by selling appraisal certificates. If conditions permit, try to choose an authoritative appraisal institution to help you test.
With the development of social economy, the concept of jewelry should be extended to include gold, silver and jewelry besides natural gems and artificial products. The industries involved in these terms are collectively referred to as "jewelry industry". The scope of "jewelry" is much larger than that of "gem" in a broad sense. Gems in a broad sense generally refer to those raw materials suitable for polishing or carving into jewelry or handicrafts.