Round diamonds don't have a QR code. You know what a QR code looks like. Why does a small diamond have a QR code? Absolutely impossible. But diamonds have waist codes and no QR codes; Waist code is the number of GIA certificate, which is GIA code; All diamonds greater than 30 points (inclusive) have GIA certificate code; If there is no GIA code on your diamond, it is not necessarily a fake diamond; It can only show that this diamond is not recognized by GIA; Diamonds that are not from GIA are generally much cheaper without GIA code; Just like two people together have a marriage certificate, which is a husband-wife relationship protected and recognized by law, and those without a marriage certificate are husband-wife relationships, but they are not recognized by law; The same is true for diamonds, and those with GIA certificates will be recognized by most people; Can be found in international authorities; Those without GIA certificate may also be real diamonds, but people always doubt the source of diamonds; No international authoritative certification body; It can also be called diamond exile; Some people want it because it is cheap.

GIA is an American Gemological Institute, which is a very powerful institution. Because 4C standard grade diamonds are customized by GIA; The so-called diamond 4C standard refers to: diamond size, color, clarity, cut and so on.

Your 5 1 diamond ring, to be honest, is quite expensive. Generally, you can buy a diamond ring of 1 carat (including GIA certificate) at this price; One more thing, different brands have different prices; The price of the same diamond ring, Dai Rui jewelry and Mu Yi jewelry will be different; This is the difference in profit points of businesses;

In fact, diamond ring is different from clothes, because diamond is an international monopoly industry, monopolized by De Beers, and almost all diamonds in the world are monopolized by it, which is one of the reasons why diamonds have the function of preserving value; There is an advertisement that says "diamonds last forever, and one will last forever", which is an advertisement of De Beers. If Taobao produces an Adidas dress, then Taobao will soon have a high imitation, and the quality is not worse than the genuine one; Diamonds are different. Not everyone can sell it on Taobao. Therefore, you must recognize the GIA certificate when buying diamonds; Moreover, diamonds bought through formal channels should not be cheap;

PS, completely by personal hand, if you don't understand anything, you can continue to ask; Hope to be adopted.