Is it Better to Have Fluorescence in Diamond?

Diamond fluorescence is a captivating phenomenon that has intrigued jewelry enthusiasts and experts alike. When exposed to long-wave UV rays, some diamonds emit a mesmerizing glow, a feature that can sometimes influence the diamond's value. But the question remains: Is it better to have fluorescence in a diamond?

Fluorescence is the glow observed when certain objects, including some diamonds, emit visible light. Specifically, diamonds with this characteristic fluoresce when subjected to long-wave ultraviolet (UV) rays, often emitting a bluish light. However, in rare instances, the emitted light might be yellow or orangy. The fluorescence ceases once the UV light source is removed.

Interestingly, not all diamonds exhibit this trait. Only about 25% to 35% of diamonds show some degree of fluorescence in response to long-wave UV light, with over 95% of these diamonds fluorescing blue. A minuscule percentage might fluoresce in colors like yellow or green.

While fluorescence is not a grading factor like the renowned GIA 4Cs (color, clarity, cut, and carat weight), it is an identifying characteristic. The intensity of a diamond's fluorescence, ranging from None to Very Strong, is described in GIA Diamond Grading Reports and Diamond Dossiers. If the fluorescence is of Medium, Strong, or Very Strong intensity, its color will be specified.

One common misconception is that blue fluorescence can make a yellow diamond appear "whiter". In reality, bluish fluorescence can enhance the appearance of diamonds with I to M color grades, making a faint yellowish diamond seem more colorless in UV light, a component of natural daylight. Consequently, diamonds with color grades I to N and very strong to medium bluish fluorescence might fetch a slightly higher per-carat price than similar color grade diamonds that lack fluorescence.

However, for diamonds with higher color grades, the scenario is different. Diamonds in the D to H color range with bluish fluorescence are often perceived as less desirable. This is because some believe that bluish fluorescence might give diamonds a hazy or oily appearance. But, in reality, blue fluorescence rarely impacts transparency. The association between fluorescence and haziness persists, but diamonds in the D to H range with very strong fluorescence often sell for less, even if their color and transparency remain unaffected by their fluorescence.

So, is diamond fluorescence good or bad? The answer is subjective. Some find fluorescent diamonds enchanting, while others might not. If you're considering a diamond with bluish fluorescence, it's advisable to view it under various lighting conditions, including natural daylight. Compare it with other diamonds of the same color grade and decide based on your personal preference.

At Robinson's Jewelers, we offer a diverse range of rings, necklaces, bracelets, and other exquisite pieces. Whether you're looking for a diamond ring, a sapphire necklace, or an emerald bracelet, we have something for everyone. Explore our collection and find the perfect piece that resonates with your style.