A few points refers to the weight of a diamond. 100 integral equals one carat. D and h are the colors of diamonds. D is the best grade, colorless and transparent. If the color grades of diamonds are close, it is difficult for the naked eye to distinguish them clearly. Some merchants will regard E-class diamond ring as D-class diamond ring, so you must buy regular brand diamond rings, such as Tiffany's, Levi's and Bulgari. Big brands are more reliable and will give customers jewelry inspection certificates.

Diamond color grade:

Extended data

The value of diamonds is determined by 4C, so 4C is very important. From the perspective of cost performance, we need to pay more attention to the selection of diamonds. In the case of a certain size, it is suggested that the cut C directly affects the fire color of the diamond. Therefore, we often say that cutting is the second life of diamonds, followed by the color C. The closer the color is to D-Z, the more transparent the diamond is. It is recommended to consider the clarity c finally.

Diamonds are measured by "carat", which is English for "carat" and abbreviated as "ct". One carat equals 100 integral, five carats equals one gram, and one carat equals 0.2 gram.

References:

Baidu encyclopedia-Kela

Baidu encyclopedia-diamond