Diamond is a physical property, and the fluorescence of diamond refers to the intensity of yellow light, blue light and other colored light emitted under the strong irradiation of ultraviolet rays. There are many fluorescent colors of diamonds, such as blue, yellow, blue, orange, pink and so on.

When selecting diamonds, especially those identified by GIA, they are all marked in the column of fluorescence, and strong and very strong reactions in fluorescence will have an impact on the fire color of diamonds.

From the front, there will be a layer of white fog to make it opaque. Generally, weak fluorescence can affect the price by 5%, normal fluorescence can affect the price by 7%- 10%, and strong fluorescence has a greater impact on higher colors, reaching 30% or even more. Especially strong fluorescence is basically 35% lower than the price without fluorescence.

Extended data:

The fluorescence of diamond refers to the intensity of colored light such as yellow light or blue light emitted by diamond under strong ultraviolet radiation. Only in the case of strong ultraviolet rays can you see a ray of diamond, which is invisible to natural light and fluorescent to the naked eye.

The fluorescence of diamonds is also strong and weak. According to GIA standard, the fluorescence of diamonds can be divided into N (none), F (weak), (medium), S (strong) and VS (very strong). Not all the five grades of diamonds have colors, but most diamonds have a little fluorescence. The fluorescence index must be written in international diamond testing, and there is no special mark on the domestic certificate.

References:

Baidu encyclopedia-fluorescent diamond