Refers to the color of diamonds, and M and N are slightly yellow diamonds. Because the color of diamond is equivalent to a high-quality filter, its function is to reduce the escape of reflected light. The whiter the color of the diamond, the more intense the color of the diamond flashes.

Similarly, colorless diamonds are rarer than yellow, and according to the different degrees of color from light to dark, the grades are divided into D, E, F, G, H, I-J, K-L, M, N-O, P-R and S-Z. Most gem-grade diamonds range in color from colorless to light yellow.

Extended data:

Diamond color classification

Grade d: completely colorless. The highest color level is extremely rare.

Class e: colorless. Only gem experts can detect trace colors. This is a very rare diamond.

Class f: colorless. A small amount of color can only be detected by jewelry experts, but it is still considered colorless. It belongs to high quality diamonds.

G-H grade: almost colorless. Compared with higher grade diamonds, it has a slight color. But diamonds of this color still have high value.

I-J grade: almost colorless. A slight color can be detected. The value is higher.

K-M grade: dark color, poor fire color, wedding diamond ring net is not provided, and customers are advised not to use it.

N-Z grade: dark color, poor fire color, no wedding diamond ring net, customers are advised not to use it.