Fluorescence

“Fluorescence” is a unique characteristic and phenomenon in which diamonds emit a soft glow when exposed to ultraviolet (UV) light. This fluorescence can range from faint to strong and can be blue, yellow, green, or orange in colour. Fluorescence is caused by trace amounts of nitrogen present in the diamond and is found in about one-third of all diamonds. The most common fluorescence colours in diamonds are blue and yellow, although some diamonds may fluoresce in shades of orange, green, red, or even white. In some cases, strong or very strong fluorescence can make a diamond appear cloudy, diminishing its transparency and eye appeal.