Fluorescence of a diamond refers to how a diamond reacts to Ultra violet rays, which makes the diamond more brighter and produces a faint blue colored shine when it is exposed to ultraviolet rays. The important elements of diamond fluorescence are color and the strength of the fluorescence.
None/Negligible – If, there is no fluorescence in a diamond then the color of a diamond is not visible.
Faint – If the fluorescence of a diamond is faint, then there will be a a very little influence of color.
Medium – If the fluorescence of a diamond is medium, then there will be a visible amount of color.
Strong – If the fluorescence of a diamond is strong, the color of the diamond is remarkably visible. There is a strong influence observed which has a significant influence on the color of a diamond.