Why do you say that the national inspection diamonds are not as good as GIA testing, but why are almost only the ring of diamonds in Mianyang stores only selling diamonds?

Why is it better than GIA diamonds?
1. There is no number on the waist of most national inspection diamonds, and each GIA diamond waist is available. The GIA number can be seen at the scene. The information on this certificate is the diamond.
2. Almost all national inspection diamond certificates are not particularly rigorous. The color and clarity cannot be accurate to a certain value. It can only give you a range. Therefore, the I-J, J-K, L-M color of the I-J-K, L-M color we often see, clarity vs, SI, and so on. The GIA certificate can be accurate to value, E color is E color, H color is H color, clarity VVS1, VVS2; vs1, vs2; SI1, SI2.
3. There is no cutting ratio diagram of the national inspection diamonds. The quality of the diamond is usually judged by the cutting ratio diagram. The GIA certificate diamond has a cutting ratio.
4. The certificate of the national inspection diamond does not have anti -counterfeiting signs, and the GIA certificate has anti -counterfeiting signs.

Why do Mianyang store only sell diamond ring?

1. Because the rigor of the national inspection certificate is not high, the cost of the certificate is also cheap. In many small places, the price of selling GIA with the national inspection is already the consensus of the merchant, and consumers can't understand these anyway.
2. Many merchants have repurchase services, and the national inspection diamonds have no number. After the repurchase, change the style, take a ring to make a new certificate. This can be sold again.

This to adopt it, thank you.

it is good