2. Generally, it includes nine items: number, verification code, appraisal result, appearance, total weight, enlarged observation, others, names of appraisers and responsible persons (handwritten version), and certificates usually have three certification marks: "CMA, ILAC—MRA and CNAS".
3. Jewelry Testing Center of China Geo University. You can view the certificate information (by quantity, weight, etc.). ) Inquire in official website, an authentication institution, and check whether the electronic certificate is consistent with the real thing. If the labels are consistent, you can breathe a sigh of relief, accurate to the decimal point, and there is no possibility of fraud.
4. Like the certificate of Peking University, the certificate issued by the Jewelry Testing Center of China Geo University generally has three anti-counterfeiting marks: "CMA, ILAC—MRA and CNAS". In addition, it has a "CAL" logo. These four logos are very important and difficult to copy!
5. Generally, it includes 9 items: appraisal result, total mass, shape, color, precious metal detection, amplification inspection, remarks, checker and reviewer (named handwritten version).