What is a diamond's fluorescence, and how can it affect a diamond's appearance and value?

Fluorescence is a natural property found in some diamonds where they emit a visible light when exposed to ultraviolet (UV) light. While some diamonds exhibit fluorescence, others do not. Fluorescence can range from very weak to very strong, and it can have a significant impact on the appearance and value of a diamond. The visible light emitted by fluorescence can give a diamond a milky or hazy appearance, which can reduce its overall brilliance and fire. This eff....