Organization name: Hunan Gold Gemstone Product Quality Supervision and Inspection Authorized Station

Tel:+8673185130102.

Address: No.290, Chengnan Zhongsi Road, Yuhua District, Changsha, Hunan, China

You can search on Baidu map:

Extended data:

Process of National Quality Supervision and Inspection Center for Jewelry and Jade;

Inspection-initial inspection-final inspection-certification:

1, test. When sending for inspection, it is necessary to bring valid identity documents to the inspection window of the testing center to go through the inspection procedures for jewelry that needs to be identified. Here, the business personnel will go through the relevant testing procedures for the samples that meet the testing scope.

After that, you will get an entrustment contract, and with this contract and valid identity documents, you will receive the certificate within the specified time and send the sample for inspection. After that, the jewelry to be identified will be put into the inspection container and sent to the sample management room for inspection together with the task list.

2. detection. After the jewelry sent for inspection is sent to the sample management room, the sample administrator will create a file for this jewelry and distribute it to the inspectors for testing. The inspector will fill in the documents according to the test results of each step.

Generally speaking, in order to ensure the accuracy of the test results, every piece of jewelry must go through at least three customs: initial inspection, audit and general audit.

3. Initial inspection. The initial inspection includes two parts, one is gem inspection, and the other is precious metal inspection.

If the jewelry submitted for inspection is inlaid jewelry, it needs to be tested separately for precious stones and precious metals. If the jewelry submitted for inspection is not inlaid with metal, then only gem testing is needed.

First of all, precious metal detection requires precious metal imprint detection (whether the manufacturer and metal imprint are complete). Then carry out nondestructive testing of precious metals (measure actual data with electronic instruments); If necessary, it can also be detected by chemical analysis of precious metals.

4. review. After the initial inspection, the results of gemstone inspection and precious metal inspection should be sent to their respective audit offices, which will be inspected and audited by special personnel, and then sent to the general audit after passing the examination.

5. General audit. The staff of the chief auditor will comprehensively review all test results. After the final review, the jewelry was sent back to the sample management room. After that, the certificate department will issue the final appraisal certificate according to the test results.