1, cgrl is an international certificate and a gem inspection certificate. This report is issued by CGRL, a professional gem testing laboratory. A certificate is a document issued by an institution, school, organization, etc. Prove qualifications or rights, which refers to the certificate that proves things.

2. The emerald certificate issued by CGRL You Guo Jewelry Testing Center is accurate. The CGRL certificate is a paper report issued by CGRL, a professional gem testing laboratory, which records the testing results of the tested gems in detail. It is an international authoritative jewelry testing institution and a common jewelry testing certificate in the domestic jewelry market.