Grade d: completely colorless. Diamonds are the highest color, perfect and colorless, and relatively rare.

Class e: colorless. Trace colors in diamonds can only be detected by gemologists, which is relatively rare.

Class f: colorless. A small number of colors can only be detected by jewelry experts, and they are still considered as colorless high-quality diamonds.

G~H grade: nearly colorless. Compared with higher-grade diamonds, they are slightly yellow in color and still have higher value.

Grade I~J: nearly colorless. A slight color can be detected. The value is higher.

K~M grade: the color is visible to the naked eye, the color is dark, and the diamond is dull. There are few diamonds in this color grade, and the color grade is low and the visual effect is poor. Customers are not advised to buy.

Diamond buying skills

1, color h or above

The chromatic aberration span is very large, but generally, as the main diamond on a diamond ring, the color grade is better than H, that is, D, E, F, G and H. The color below H is not recommended because it is yellowish to the naked eye. It is recommended to buy e, f and g colors.

2. It doesn't hurt to have a lower definition.

Although clarity is one of the important indicators in 4C, don't be fooled into choosing the highest level when choosing a drill bit. The determination of cleanliness needs to be observed from the table with a magnifying glass of 10 times, which is difficult to see with the naked eye.

3, the weight of 50 points or more.

According to the survey data, about 43% of them weigh more than 50 points, followed by 1 carat, accounting for about 27%. Therefore, more than 50 points to 1 carat is the most common and mainstream choice.