Certificates cannot be reused at all. The certificate covers the diamond size, diamond clarity distribution map (each diamond has a different clarity distribution, which is naturally formed), diamond color, fluorescence, cutting (the ratio of table top, waist and pavilion is expressed as a percentage), and the barcode does not match the barcode of your diamond. Generally, I will show you the bar code on the diamond waist before inlay, and then make it after inlay.
After mosaic, you can still see the laser code. Some numbers will turn pale and white after washing. For example, in our sales experience, men look at bar codes more seriously than women. After men look at it clearly, women often haven't found the numbers yet.
The material of the ring seat will be stamped with steel seal on the inner ring of the ring seat, and the probability that the steel seal is forged is very small. If you are not at ease, you can also take it to the testing station to test its purity yourself. If the purity is found to be poor, go to the industrial and commercial bureau.
Every big city has a quality supervision bureau and a jewelry and gold inspection station. You should look for this specific address in your own map. Depending on which city you can find the city inspection station or the provincial inspection station, Beijing will find the national inspection station. If the cost is different in different regions, it will be different for different customers. If you are a merchant and sign a cooperation contract with them, it will be much cheaper to test the unit price of one. If you are a person, it will be more expensive just to test the authenticity of a thing. A friend went to Hangzhou Inspection Station to test a gem and charged him more than 200 yuan, which is already very expensive.
Before answering this question, it is necessary to popularize the knowledge of diamond classification. The classification of diamond clarity depends on its contents. For example, a feather with different size and position will make different checkpoints judge different grades, because natural inclusions are not exactly the same, only similar or dissimilar, and distinguishing their grades will also depend on different standards in different regions. If the test result is different from that provided by the merchant, you can show your merchant's certificate to the people at the test station, and they will tell you why it is different. Some of them are normal phenomena, and some of them are fakes. You can take these valid certificates to the Industrial and Commercial Bureau to complain. The industrial and commercial bureau will handle it for you.
Finally, give a summary to the pro:
Parents are generally less likely to be deceived as long as they shop normally and don't buy impulsively. Diamonds are not so easy to fake. At present, the synthesis process of diamonds is still difficult to reach the gem level, and the diamond market is not as terrible as you think. On the contrary, at present, diamonds are the most transparent and safest gems in the gem market, so you can rest assured.