Diamonds and meteorites are very precious items and need to be identified by professional institutions. The following are the institutions and methods of diamond and meteorite identification.

1. Diamond Evaluation: International Diamond Association (IGI). IGI is an international certification body, specializing in diamond identification, cutting and jewelry identification. The certificate issued by IGI has global recognition and authority.

2. Diamond appraisal: International Association of Jewelry Appraisers (NAJA). NAJA is a non-profit organization, specializing in the evaluation, identification and certification of jewelry and diamonds. Najia members can provide authoritative appraisal certificates.

3. Diamond identification: local jewelry store. Some local jewelry stores also provide diamond appraisal services, but we should pay attention to choosing qualified and reputable jewelry stores.

4. Purple Mountain Observatory of China Academy of Sciences. The planetarium of Purple Mountain Observatory can provide meteorite identification service, and it needs to provide relevant evidence and samples for identification.

5. Meteorite identification: School of Earth Science and Surveying and Mapping Engineering, China University of Mining and Technology. The Mineral Rock Testing Center of the Institute has world-leading geoscience instruments and equipment, which can analyze and identify precious rocks and meteorites.