When most people hear the word fluorescence in diamonds, the reaction is often negative — but the truth is, it’s one of the most misunderstood characteristics of a diamond. At Diamond Tales, we believe education empowers confidence, and that includes shining light (literally) on what fluorescence really means.

What is Fluorescence?

Fluorescence is a natural phenomenon where a diamond emits a soft glow when exposed to ultraviolet (UV) light — similar to how your teeth appear brighter under black light.

• Intensity levels: None/Absent, Faint, Medium, Strong

• Duration: Only visible under UV light — it disappears once the light source is gone

Contrary to common belief, fluorescence does not damage or permanently change a diamond.

Does Fluorescence Affect Beauty?

In most cases, fluorescence is invisible to the naked eye. Unless the stone appears hazy or oily in strong sunlight (which is rare), fluorescence has little to no impact on sparkle.

✨ In fact, some diamonds with faint to medium fluorescence can even appear whiter in sunlight — a benefit for slightly lower color grades.

Fluorescence and Value

Because of market misconceptions, diamonds with strong fluorescence are often priced lower than non-fluorescent diamonds. This does not mean they are inferior. Many look just as beautiful as their counterparts.

Pro tip: Always view a fluorescent diamond in person before judging it by its grading report. You might find its brilliance indistinguishable from a non-fluorescent stone.

The Diamond Tales Perspective

Fluorescence is not a flaw — it’s simply part of nature’s fingerprint on your diamond. What truly matters is how the diamond performs in real life.

At Diamond Tales, we guide clients to focus on the cut and overall beauty of a stone, not just the lab report. Sometimes, choosing a fluorescent diamond can mean finding a hidden gem with exceptional sparkle at a better value.

✨ Ready to explore more? Discover our Engagement Ring Playbook or book a Custom Consultation to see diamonds in person.