First divided into white diamonds and colored diamond;

White diamonds are divided into:

Diamond grading report (commonly known as big certificate, one carat and above, not absolute);

Diamond file report (commonly known as GIA certificate, less than one carat, not absolute);

Report on the origin of diamonds;

Electronic report on diamonds; ;

Diamond focus report; ;

Special description of diamond report (high-clarity large-carat diamond, natural second-class diamond);

The price of each certificate is different, and the cost of diamond appraisal for all sizes of the same certificate is also different. For details, please refer to the GIA official website Expense Details. Here is a general price and analogy to give you an idea;

The most common ones are diamond classification report and diamond file report, that is, big certificate and small certificate of diamonds;

The price of diamond grading report (certificate): it can be simply recorded as $65,438+065,438+00 per carat, and the appraisal fee for 65,438+0.5 carats is about $65,438+065 (actually, $65,438+030);

Diamond file report (small certificate) price: it can be simply recorded as $85 per carat and $42.5 for 0.5 carat rough diamonds (actually $42);

The above is only the fees charged by GIA Lab. Actually, GIA doesn't accept individual orders, so most people can only entrust several floors to big jewelry member companies. There are some expenses in the middle, as well as round-trip customs declaration freight and insurance. The actual appraisal cost of a carat diamond is about 2000 yuan, which may take about two months, which can be said to be very expensive and long trouble. . .

Is there any other better way?

Of course, the most authoritative gemstone appraisal institution in China-National Gem and Jade Quality Supervision and Inspection Center (NGTC) has laboratories in major cities in China, such as Beijing, Shanghai and Guangzhou, which can be sent for inspection in person or by express delivery. The appraisal cost is about 400 RMB per carat, and the appraisal period is short, and the results issued are basically consistent with GIA.

Say so much simply, I hope it will help you!