A diamond should have a certificate of authenticity, which explains the quality, weight, cutting technology (and place of origin) of the diamond.
Steel seal: the diamond appraisal certificate must have a clear steel seal, with the words appraisal unit and the anti-counterfeiting mark of the appraisal unit on the steel seal.
Date: the date on the certificate, the date when the diamond was identified.
Extended data
Precautions for purchase:
First, verify the merchant and determine the certificate.
Buying expensive things like diamond rings online depends on the integrity of the merchants. Does the company exist? (Business License and Tax Registration) Use the stationmaster tool to check whether the domain name is filed and whether the filed name is consistent with the company name. Merchants should also provide diamond appraisal certificates, such as international certificate GIA/HRD/AGS/IGI/EGL and domestic certificate NGGC/NGTC/NGDTC.
Second, it's not a loss to shop around. There must be something for you.
As the saying goes, if you don't know the goods, you are afraid to shop around. There is no harm in seeing more and comparing more, but the premise is to see clearly the quality of diamonds and the workmanship of jewelry, and the price of diamonds should be relatively stable and transparent. A better way is to go to the jewelry wholesale place to investigate, or ask someone who knows to do it.
Third, choose the diamond ring that suits you according to your age.
Generally speaking, it is right for young people to choose diamond ornaments with low price and novel design as their starting point according to their own consumption ability. With the growth of age and economic strength, you can choose bigger diamonds and mature styles. It is not appropriate for people over 30 to wear a small diamond ring, just like putting a small light in a big room, the light is difficult to show. Choose according to your age and status, so that the diamond ornaments will complement you.
Fourth, ask for quality guarantee and after-sales service card.
Only by understanding the reputation of the merchants can we consider buying. After buying, you should ask for the diamond appraisal certificate and quality guarantee. At the same time, after wearing diamond ornaments for a period of time, it is necessary to do cleaning, renovation and maintenance. Perfect after-sales service is essential. This is also an important factor that you need to consider when choosing a business.
References:
Baidu encyclopedia-diamond ring