Understanding Diamond Fluorescence
Let’s take a look at what diamond fluorescence is, how it’s graded, how it affects a diamond’s quality and what you need to keep in mind when considering diamond fluorescence as a whole.
What is Diamond Fluorescence?
Diamond fluorescence is the measurement of how a diamond visibly emits light when exposed to ultraviolet light.
Examples of ultraviolet light (UV light) include black light and direct sunlight.
It is estimated that around 30% of all diamonds have some kind of glow.
When we examine the fluorescence of diamonds under UV light, the light that is produced is blue in color in almost every instance.
Very rarely do we note fluorescence of white, green, yellow or red.
According to GIA’s guidelines, fluorescence is graded into the following categories:
How does Fluorescence Affect my Diamond?
The grade of fluorescence found in a diamond will affect different diamonds in different ways.
In some cases, fluorescence will improve the color of the diamond, while in other instances fluorescence will make the diamond appear hazy or cloudy.
When a diamond has a hazy appearance, its overall quality is impacted and will often result in less sparkle & a reduced aesthetic appeal.
When is Fluorescence a Bad Thing?
Strong or Very Strong blue fluorescence: Diamonds with a strong or very strong fluorescence grading will typically appear hazy and unclear.
While this effect can usually only be seen in UV conditions, it is important to note that sometimes fluorescence can present itself in regular lighting conditions so it’s always better to be safe rather than sorry.
Medium blue fluorescence with a high color grade: Diamonds in this category will typically also appear hazy with a milky effect on the color.
Colorless diamonds and fluorescence: Diamonds in the D to F range are negatively impacted by fluorescence in many ways. On top of having a decreased clarity quality, their overall aesthetic appeal is decreased which means it will lose a significant amount of retail value.
Strong Blu Fluorescence
It just makes sense that a diamond with strong blue fluorescence will only really impact those who spend their time under UV lights, seeing as fluorescence cannot really be seen with the human eye.
Some people will claim that diamonds that display a strong blue fluorescence under UV lights will have a diminished appearance in regular lighting conditions too.
This GIA study disproves this claim, but not indefinitely.
To reiterate, fluorescence in a diamond refers to how the diamond emits light when exposed to UV light and when a blue color is displayed.
Keep the Following in Mind when Shopping for Fluorescent Diamonds
If you have investigated diamonds with a high level of fluorescence and have determined that it doesn’t affect your personal taste, go ahead and purchase one.
Remember that fluorescence can enhance a diamond’s color.
Diamonds of a high fluorescence level, such as strong blue, won’t always have a diminished overall appearance.
Because fluorescence is sometimes perceived as a negative thing, diamonds that feature fluorescence will cost less. Low levels of fluorescence can even sparkle more because of this.
Make sure that the retailer you plan on purchasing your fluorescent diamond from has a decent return policy—you never know.
As is the case with buying any quality of diamond, always purchase fluorescent diamonds from a reputable jeweler known for a high level of quality and service.
While you are looking at fluorescent diamonds, don’t be shy to ask the jeweler to whip out their UV light. It’s important that you see, and judge, for yourself the level of fluorescence present & how that effects the diamond’s overall appearance.
High Fluorescence And Hazy Diamonds?