That's right. Official website of Guangdong Zhongzheng Jewelry Appraisal Co., Ltd. shows that Guangdong Zhongzheng Jewelry Appraisal Co., Ltd. is a third-party authoritative jewelry product quality inspection and testing institution authorized by Guangdong Provincial Bureau of Quality and Technical Supervision. The agency has a professional appraisal team, advanced equipment and strict appraisal process, which can accurately identify the authenticity, quality and origin of jewelry.