1. The state forces the printing of the appraisal certificate for the machine, and the appraisal certificate filled in by hand has no reference value.
2. There are five kinds of institutional qualification certification: CAL certification, CMA certification, CNAL certification, CNAS certification and ICLA-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.
3. The contact information of the institution must be printed on the certificate. 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.
Introduction of GCGI Jewelry Appraisal Certificate
GCGI Laboratory was founded by researchers from GIA Laboratory in the United States and FGA Laboratory in the United Kingdom, together with famous European jewelers and colorists, 20 15. 2 1 century, the economies of all countries in the world are stable, and the demand of colored gems is increasing gradually. Because all the laboratories in the world are ambiguous about colored gems's grading system, there is an urgent need for a unified standard with scientific analysis and large-scale replication to meet people's large demand for colorful treasures.
Therefore, GCGI certificate prospectively summarizes GIA's diamond grading experience, and systematically summarizes colored gems's color concept system by combining the colors that can be distinguished by human eyes with the colorist's color system experience through huge colored gems data. It has played an important role in the rapid development of colored gems industry in the future, and in the following time, many standards for analyzing the color of colored gems have been issued, which is convenient for people in the industry to identify the color of gemstones more efficiently.