It's just a brand difference. Many of them are brand benefits. ..

The basis for distinguishing the quality of diamonds is 4C classification ... considering the color transparency and carat size of diamonds ... and referring to the certificates of diamonds, some are national inspection certificates and some are GIA. This price will also vary a lot ... diamonds with international certificates will be 2-3 times more expensive. ...

This is my major. ..

Actually, the brand is not very important.