What is diamond fluorescence?

Diamond Fluorescence refers to the blue light or other colors of light emitted by a diamond under intense ultraviolet light. It is created when the electrons of a diamond are stimulated by high frequency energy, which is forwarded into light energy to emit visible light.

In normal daylight, most of a diamond's fluorescence is not noticeable, as it is only visible when a diamond is exposed to ultraviolet light at a close distance. However, fluorescent light also has a certain impact on the value a diamond. Some diamonds with strong fluorescence for example, will see their transparency decrease, making them appear white. In a GIA diamond grading report, a description of the fluorescence is generally recorded. According to GIA statistics, about 25%-35% will show different degrees of fluorescence, 90% of which emit blue light, while the rest emit other colors, such as yellow, red, orange, white and green light.

  

Levels of fluorescence

(1) None
(2) Faint
(3) Medium
(4) Strong
(5) Very Strong

   

  

The effect of fluorescent reactions on diamonds

Fluorescent reactions can affect diamonds in the following ways:

 

Diamonds of D-I color - The stronger the fluorescence, the greater the chance that the diamond will appear cloudy. As this affects its fire, it will negatively impact its price.

 

Diamonds of J color or below - Diamonds of the same color, visually, may be whiter with fluorescent light.

  

The advantages of fluorescent diamonds

Compared to the remaining 4C factors, the Faint or Medium level of fluorescence has less impact on the appearance of a diamond, and the price of a fluorescent diamond is generally lower in any color, making it suitable for customers with lower budgets. In addition, people select and purchase diamonds based on personal preferences, and a small number of customers are attracted by these interesting features.