It's true. According to the relevant information of Guangdong Jewelry Judicial Appraisal Agency, Guangdong Jewelry, Jade and Precious Metals Testing Center is authentic. Guangdong Jewelry, Jade and Precious Metals Testing Center, also known as Guangdong Technical Supervision Jewelry and Precious Metals Quality Inspection Station, was established in 1995. 1996 obtained CAL testing authorization certificate and CMA measurement certification certificate, and then successively obtained CNAL laboratory accreditation certificate, CNAS accreditation certificate and Guangdong Jewelry, Jade and Precious Metals Testing Center. It has developed from a routine gem identification laboratory to a leading large-scale jewelry and precious metal detection institution in China.