Pigeon blood red originally refers to the color of the top ruby produced in Myanmar. Later, with the development of the market, pigeon blood red gradually became a color noun, which no longer has the significance of origin identification, but still refers to high-quality rubies. Dove blood red is the top color of ruby, which has certain requirements for hue, saturation and brightness of ruby. In other words, there is a certain standard for pigeon blood red, which is not determined by merchants, but a certificate issued by an authoritative jewelry appraisal and testing institution.

GRS is the first institution that appears pigeon blood red as a color scale on the ruby identification certificate, and it has high authority in the industry. On 20 18, the grading standard of pigeon blood red was adjusted. Pigeon blood red that is black will no longer be rated as pigeon blood red, and relevant explanations or certificates will no longer be issued. Of course, the judgment of the color on the certificate is not absolute. After all, people's judgment on color is subjective, and the color graders of appraisal institutions will also be subjective in color grading, and working hours will affect their judgment on ruby color grade.

The identification of pigeon blood-red gems requires professional knowledge, environment and instruments, and even the color classification needs professional and systematic training to be competent. Therefore, many methods of identifying gems without scientific basis cannot be used at will, which will cause irreparable losses to your gems.