What Is Diamond Fluorescence

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If you’ve recently decided on buying a diamond, you’ve probably already discussed factors like cut, color, clarity, and carat with your local retailer. These are factors that influence the value of a diamond by increasing or decreasing it. However, some properties of a diamond don’t really influence the value all that much.


What is Diamond Fluorescence?

Fluorescence is such a factor and it is widely misunderstood. It can be defined as the reaction of the minerals of a diamond that can only be viewed under black light.

When viewed under an ultraviolet lamp, the diamond displays a blue or yellow colored hue. When the elements in a diamond are exposed to the energy in UV light, they absorb it and emit excess energy. They do this by releasing photons, which is the light we see as fluorescence. Since sunlight contains ultraviolet rays, fluorescence can be observed in natural light as well.

This property is not present in all diamonds and about 30% emit it. The grading is different for those that do and it ranges from faint to very strong.

In regular light, diamonds with a faint grade of fluorescence look no different from those that emit none. The difference in price (not value), however, is vast. While some are purists they would prefer the one with none others might think the fluorescence is just as bright hence makes for a better price.


Should You Buy Diamonds with Fluorescence? 

You might wonder why some people would even consider a factor that isn’t visible in natural light, it depends on what matters to the person buying it.

This is not always the case, though. In cases that the fluorescence is strong or higher, the diamond can sometimes appear to be hazy. These would appear as white spots on our eyes. In other cases where the diamond doesn’t appear to be hazy, it can be a good thing since it would allow you to buy a diamond as bright as one without fluorescence at a cheaper price. The presence of fluorescence can allow further negotiation with your retailer.  

The effect of fluorescence can even be a good one due to a trend in the relationship between the color and fluorescence grade. Diamonds that scored I-M on the color grade would appear more colorless if they had more blue fluorescence. This can be a good thing for the budget since it allows you to buy a low color grade diamond that appears as colorless.

These details are essential knowledge when it comes to buying a diamond. This is because many retailers will refer to it as a negative factor and can be misunderstood by those that don’t do their research. They get this particularly notorious reputation from some years ago when they were sold at a premium price under a ‘blue-white’ label. Originally used to sell high-grade diamonds with fluorescence, it was used as a technique to sell low-quality stones by passing them as ‘blue-white’ diamonds.

It can be extremely useful if the above-mentioned points are followed and considered before buying a diamond. It can help make a better decision while keeping the budget in mind.