Gem identification is Shenzhen Shenzhong Gold, Silver and Jewelry Testing Center Co., Ltd. The testing organization of Zhongshen Gold, Silver and Jewelry Testing Center can't provide valid qualification certificate when law enforcement agencies investigate and deal with it. Testing equipment, official seal and steel seal are all here, and a large number of suspected forged appraisal certificates amounting to 200,000 yuan were also found. Among them, CNAS (National Accreditation Mark of China Laboratory) in a certificate was actually written as "CNZS", and the registration number noted after inquiry was also fictitious. Law enforcement officers also found that the operator installed monitoring equipment in the public space of the corridor privately, aiming at the door to avoid supervision and inspection.

There are at least three kinds of appraisal institutions that can issue jewelry appraisal certificates in China: they are determined by the manufacturers themselves; Testing centers such as universities, research institutions and associations; Testing centers authorized by AQSIQ include national, provincial and prefecture-level testing centers.

The state has strict qualification requirements for jewelry and jade quality appraisal institutions, and the appraisal certificate issued is only valid if it passes the review. CMA, CAL and CNAS are common in the certificate of jewelry and jade appraisal.

Extended data:

The mark that CMA testing institutions are qualified in measurement certification, and the institutions with this mark are legal testing institutions. Institutions engaged in social testing and inspection of products within the territory of China must be qualified by the national or provincial metrological certification management department in conjunction with recognized institutions, and can engage in testing and inspection activities only after being established or authorized according to law;

CAL has passed the mark of inspection organization recognized by national quality inspection, and the organization with this mark is qualified to make arbitration inspection conclusion. Having CMA mainly means that the testing personnel, testing instruments, testing basis and methods are qualified, and the premise of having CAL mark is that the measurement certification is qualified, that is, having CMA qualification, and then the quality management conditions of the organization also meet the requirements. Therefore, it can be considered that CAL is better than CMA only, and the working quality and reliability are further improved.

CNAS was approved by China National Accreditation Committee for Conformity Assessment, which was formed by the merger and reorganization of former China Certification Body National Accreditation Committee (CNAB) and China Laboratory National Accreditation Committee (CNAL), and supported international mutual recognition. Any of the above three marks is valid, especially the first mark CMA, which is the basic requirement of national laws for testing and inspection institutions.

Shenzhen Shenzhong Gold and Silver Jewelry Testing Center Co., Ltd.-Certificate Inquiry

People's Daily Online-False certificates of jewelry and jade emerge one after another. Experts teach you how to identify the authenticity of certificates with the naked eye.