Reliable. Huajian Zhixin Beijing Jewelry and Jade Appraisal Center is a jewelry testing institution authorized by the state according to law and certified by the state. It is a third-party impartial testing organization with independent legal person, mainly engaged in jewelry and jade identification, precious metal detection and diamond identification and grading. Its appraisal results have high credibility and authority, and also have a certain popularity and reputation in the industry.