Only by getting GIA certificate back can Hong Kong take the stone back and send it back to the United States to issue a certificate. But Hong Kong can't. And the cost is very high. Even if you take it back to the merchant you bought at the beginning, he can take it abroad for you, but the expenses must be paid by himself. If your diamond is not very big, don't renew your GIA certificate.

In the United States, the local certificate is above $65,438+000 and below $80. It's more expensive to take it from here.