Some high-quality diamonds display a visible light when they are exposed to ultraviolet light. This is known as fluorescence. Under most lighting conditions, a diamond’s fluorescence is not visible to the naked eye. In the diamond industry, the existence of fluorescence in a diamond (caused by the natural mineral properties of the diamond), has caused many debates and has influenced the pricing of diamonds.

You may find in colorless or near-colorless diamonds that exhibit fluorescence have slightly lower prices than those that do not. Then again, fluorescence makes diamonds with lower colors look whiter and brighter.

Read about diamond color

Diamond Fluorescennce