The special certificate for diamond grading appraisal has the highest authority in the industry, and its certificate is circulated all over the world, and the most advanced gem technical treatment in the industry can basically be detected.

This certificate is in the international leading position in the research and identification of gemstone color classification and is credible. The first is to look at the final evaluation. Cutting evaluation mainly includes symmetry evaluation, polishing evaluation and overall cutting evaluation. If all three cut evaluations are perfect and excellent, then the diamond you buy is the best. The second is to look at the diameter and height of diamonds.