The "D" on the diamond ring is the initials of diamond, which means diamond. In general, the diamond weight will be marked on the ring, such as 1 carat, that is, d1.0ct. If there is any doubt about the authenticity, it is best to send it to the jewelry appraisal agency for inspection and judgment.

The D color of diamond actually refers to the standard of one of the C colors of diamond ring 4C. Generally speaking, the color of white diamonds is classified in descending order from D color, and the color of diamonds is divided into 1 1 grade, and D to Z are arranged alphabetically, so when the clerk says it is D color, it means that the color of diamonds is good.