On the back of the certificate, in addition to the qualifications of the institution, there must also be detailed information such as the name, contact number, address and website of the appraisal institution.

2. The qualification of the institution must be printed on the certificate.

There are five kinds of institutional qualification certification: CAL certification, CMA certification, CNAL certification, CNAS certification and ILAC-MRA certification. The inspection report marked "CMA" can be used for product quality evaluation, results and judicial appraisal, and has legal effect. This symbol only indicates that the organization is a unit that has passed the measurement certification review and is a necessary qualification for any unit that issues a jewelry appraisal certificate.

The certificate must be signed by the inspector

According to Article 14 1 of China's Criminal Law, "It is a deliberate crime to hope or let this happen knowing that one's actions will have harmful consequences to society." Only the signature of the inspector can guarantee the authority and authenticity of the certificate!

4. The appraisal content on the certificate is comprehensive and detailed.

A. Look at the test content

Including the name, color, purity, total mass, density, refractive index and other items of jewelry, these items are very strict in the nationally certified jewelry and jade testing institutions.

B. Look at the signature of the appraiser

The appraisal certificate must be signed by two appraisers before it is valid. One is an appraiser and the other is an auditor.

C.look at this seal

Strictly speaking, it should be a steel seal, and the font on it can be clearly recognized.

D. Look at this number.

There is the serial number of this certificate on the back of the appraisal certificate, which should be consistent with the serial number posted on the back of the physical object.

The purity inspection certificate of precious metal ornaments should pay the most attention to the types and contents of precious metals.

Jewelry and jade appraisal certificate, the inspection conclusion is the most important. According to the national standard, the word "natural" is no longer marked on natural jewelry and jade, but the artificially treated or synthesized gems must be clearly marked. For example, the identification certificate of jadeite is generally marked as: jadeite (a), bleached and glued jadeite (b) and dyed jadeite (c).

5. The identification items on the certificate must be printed by the machine.

Extended data:

The National Jewelry and Jade Quality Supervision and Inspection Center (hereinafter referred to as the Inspection Center) is a national professional quality inspection institution authorized by the relevant competent departments of the state according to law, and it is the authoritative institution for jewelry and jade testing in China.

The inspection center provides entrusted inspection services to the society, undertakes national market supervision and inspection, arbitration inspection, import and export commodity inspection, and formulates and revises relevant national standards. It plays a guiding role in standardizing the domestic jewelry market and promoting the healthy development of the jewelry industry. It is a national professional quality inspection institution for jewelry and jade authorized by AQSIQ according to law.

It has passed the national metrological certification, the laboratory ISO/IEC 17025 accreditation of China National Accreditation Committee for Laboratories, and the national product quality supervision and inspection institutions. It is the authoritative organization for jewelry and jade testing in China.

The center has first-class laboratories in Beijing and Shenzhen. The center has gathered a large number of outstanding professional and technical personnel, has advanced testing equipment in the world today, and has established a scientific and rigorous quality management system in accordance with international standards. Personnel, technology and management have reached the international advanced level.

GIC China Geo-University established the Gemological Research Office on 1983, and developed into the Gemological Research Institute, the Gemological Institute approved by the Ministry of Geology and Mineral Resources on 1992, and the Gemological Testing Center on 1993. The center mainly serves social appraisal, consultation, training, exhibition, production and processing.

At present, it has trained thousands of technical backbones and hundreds of senior appraisers for jewelry quality inspection institutions, production, processing and wholesale units all over the country, and has been praised as the "cradle of treasure education" at home and abroad. Appraising and consulting hundreds of thousands of jewels and jade articles for the society every year.

At present, it has trained thousands of technical backbones and hundreds of senior appraisers for jewelry quality inspection institutions, production, processing and wholesale units all over the country, and has been praised as the "cradle of Baojiao" at home and abroad. Appraising and consulting hundreds of thousands of jewels and jade articles for the society every year.

References:

Baidu Encyclopedia-Jewelry Appraisal Certificate