According to GIA's color grading table, diamonds are classified into 23 grades, from completely colorless D to yellowish brown Z. Among them, D.E.F belongs to the colorless range, G.H.I.J belongs to the near colorless range, K.L.M is light yellow, and below N is light yellow. The name below Z is colored diamond, which is very expensive.

E is one of the diamonds with good color, which is completely colorless, but such diamonds are also very rare. The color grades of diamonds are mainly divided into D, E, F, G and H. The closer the diamond ring is to D, the better the color is, and the closer it is to colorless. In the jewelry industry, D-class diamond rings are of high value. ?

The H color of diamond refers to the color grade of diamond, and the color of diamond is one of the important factors affecting the price of diamond ring. The whiter the diamond color, the higher the value of the diamond ring. According to the different color shades of diamonds, the color grades of diamonds are divided into D-Z colors, and the H color in diamond rings refers to diamond rings that are close to colorless, and the value of H color diamond rings is still relatively high.

Extended data

Diamonds have many natural colors, from precious colorless (white after cutting), rare light blue and pink to common light yellow. The more transparent and colorless, the more white can penetrate, and the richer the color after refraction and dispersion.

The grading of diamond color is determined by technicians repeatedly comparing the diamond to be graded with the standard color colorimetric stone in the grading environment of professional laboratories. The whitest diamond is set to D (that is, starting from the first letter of the diamond). The color of diamonds is divided into 1 1 grades, which are D, E, F, G, H, I, J, K, L, M and N in turn.

The weight of diamonds is measured in carats (also called cards). 1 carat = 200mg = 0.2g A carat is divided into one hundred parts, and each part is called one point. 0.75 carat is also called 75 cents, and 0.02 carat is 2 cents. Under other similar conditions, with the increase of diamond weight, its value increases geometrically; Diamonds with the same weight will have different values due to different colors, cleanliness and cutting. ?

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