Does Diamond Fluorescence Affect Value?

does diamond fluorescence affect value

When shopping for a diamond, you probably know you should closely examine the stone’s 4C’s, meaning the cut, carat, color, and clarity - but what about its fluorescence? Many people are unfamiliar with this term which further describes the diamond outside of its clearness, color, size, and shape.

Diamond fluorescence refers to the glow produced by a diamond when underneath an ultraviolet light, or a blacklight. It’s estimated that about 30% of diamonds have some degree of fluorescence, so chances are you'll run into some of these stones while shopping for a diamond.

How is diamond fluorescence rated?

A diamond’s fluorescence is rated on a scale from “none” to “very strong,” with “strong,” “medium,” and “faint,” in between. Although the Gemological Institute of America (GIA) does not consider fluorescence a grading factor similar to cut, carat, color, or clarity, it is, nonetheless, considered an identifying characteristic of a diamond. If a diamond has a fluorescence rating of medium, strong, or very strong, it will be mentioned on the GIA’s official report.

How is diamond fluorescence rated?

How does fluorescence affect the value of the diamond?

Sometimes, a diamond’s fluorescence will have no effect on its price, while at other times it will. Colorless diamonds, those with a color grade of D-F, are sold at a discount if they have a fluorescent glow underneath a UV light. This is because the fluorescence is seen as a flaw, so the diamond no longer holds the same value. Some people believe that fluorescence causes D-F colored diamonds to look slightly oily or hazy, which is not a desirable quality.

However, fluorescent diamonds with a color grade of I-M are actually sold at a premium. Why? The fluorescent glow of a diamond appears blue, which complements the yellow undertones of an I-M colored diamond, making it appear whiter. Therefore, an I-M colored diamond will appear more like a higher quality stone when it has a slight fluorescence.

How does fluorescence affect the value of the diamond?

Is it possible to differentiate between diamonds with and without fluorescence?

According to a GIA study from 1997, the fluorescence of a diamond does not affect its appearance when looking at it from upside down. However, when the diamond is right side up, the average person may be able to spot a difference in a diamond with a strong or very strong fluorescence. However, as we mentioned before, the difference is not a bad thing, as the fluorescence may slightly enhance the visible color of a lightly colored diamond.

Is it possible to differentiate between diamonds with and without fluorescence?

Should I buy a fluorescent diamond?

The final decision on whether or not to buy a fluorescent diamond is obviously yours, just remember that the four C’s (color, cut, clarity, and carat) are far more important than fluorescence. Because fluorescence doesn’t negatively affect the appearance of the diamond, it shouldn’t play a big role in deciding which stone is right for you. In fact, some shoppers prefer buying fluorescent diamonds because of the small reduction in price. Before buying a diamond, make sure you talk to the retailer about its fluorescence to ensure you are informed about every aspect of the stone prior to making a final decision.

Should I buy a fluorescent diamond?

Recently Published Articles

  1. Home
  2. Does Diamond Flourescence Affect Value
  3. Articles
  4. Does Diamond Fluorescence Affect Value?