The certificate is reliable, very reliable. GRC certificate industry serves professional and reputable jewelry merchants, jewelry practitioners, amateur jewelry lovers, people who are about to engage in jewelry industry and consumers, with more than 3,000 member units.

GRC's certificate is very authoritative.

The laboratory has senior professionals composed of senior jewelry appraisers. Is a professional jewelry appraisal team with rich experience and international vision, committed to participating in colored gems grading and pearl grading. The laboratory adheres to strict control and testing standards, carefully prepares the experimental data of each sample, and provides scientific, fair and accurate identification and grading services for the society.