Method of authenticating jewelry and jade

How to verify the authenticity of jewelry and jade? How to do it? I believe that players who have bought jewelry and jade hope that the other party can issue a CMA certificate for gems and jade. It is not that they don’t understand jade, but that if the baby is not distracted by a name, it will always feel that it is not a taste, just like no household registration. Inquiry, can issue a formal jewelry and jade quality inspection certificate, it must be a nationally recognized testing agency. We can confirm the inspection of the issued certificate through the mark on the certificate. How to verify the authenticity of jewelry and jade? How to do it? I believe that players who have bought jewelry and jade hope that the other party can issue a CMA certificate for gems and jade. It is not that they don’t understand jade, but that if the baby is not distracted by a name, it will always feel that it is not a taste, just like no household registration. Inquiry, can issue a formal jewelry and jade quality inspection certificate, it must be a nationally recognized testing agency. We can confirm through the mark on the certificate that the testing agency that issued the certificate is approved for those special qualification certifications. Next, let's look at the identification steps and methods of jewelry and jade with the author: 　　1. Jewelry and jade identification query steps: 　　1. The task number is located in the upper left corner of the certificate, and the identification card is a 13-digit code composed of letters and numbers, for example: WA10JZ0927041 Or 2009JZ0919035　　2, the certificate number is a combination of letters and numbers, for example: AS36218　　3, the total mass is the total mass indicated on the certificate or identification card, such as 105.394 (just enter the number)　　4, the identification certificate and the identification card must be at the same time Enter the task number, certificate number and total mass to query.　　 5. The task number is not displayed on the identification label and cannot be queried.　　2. The authenticity of jewelry and jade identification can be inquired by the following methods: 　　 Look at the inspection agency: The state has strict qualification certification for the jewelry and jade quality appraisal agency, and the authentication certificate issued is valid only after passing the certification. The jewelry and jade identification certificate issued by it bears the CMA pattern (the mark of the National Bureau of Quality and Technical Supervision), or CAL, CNACL, one of these letters is valid, especially the first mark CMA, which is a national legal requirement Certification mark. Consumers buying jewelry appraisal certificates with the CMA logo, to a large extent, prove the authority of the appraisal certificates used by merchants and the guarantee of product quality.　　 1. 'CMA' is a measurement certification review agency composed of the country or province, and the measurement certification unit that has passed the review. The basic requirements of national laws for testing and inspection agencies, institutions with this mark are legal inspection agencies.　　2, 'CAL' is the mark of a testing and inspection agency recognized by the national quality review. Organizations with this mark are qualified to make arbitration inspection conclusions. The work quality and reliability of institutions with CAL are higher than those with CMA.　　3, 'CNACL' national laboratory logo, according to the relevant agreements of China's accession to the WTO, the 'CNAL' logo can be mutually recognized internationally, for example, it can be recognized by the United States, Japan, France, Germany, the United Kingdom and other countries.　　 Third, look at the test content, including jewelry name, color, clarity, total mass, density, refractive index and other items. These items are inspected very strictly by the nationally certified jewelry and jade testing agencies.　　4. Look at the signature of the appraiser: the appraisal certificate needs to be signed and confirmed by two appraisers, one is the appraiser and the other is the verifier.　　 5. Look at the seal: The strict one should be the steel seal, and the font on it can be clearly identified.　　 VI. Look at the number: The number of the certificate is on the back of the appraisal certificate, which must be consistent with the number posted on the back of the actual product.　　 Seven. Some certificates are available for website query or SMS query. If you are not worried, you can check it. Enter the number and you will be able to find the style you bought.　　 The above is the information about jewelry and jade identification summarized by the author for you. The information comes from the Internet. If there is anything wrong, please understand. If you need knowledge and understanding of jewelry setting, please pay attention to jewelry setting. Jewelry setting is waiting for your inquiry!