Optical Property · Reviewed definition

Fluorescence

Visible light emitted by a material while it is exposed to an energy source, commonly ultraviolet radiation in gem testing.[1]

Plain English

What it means

Some gem materials emit visible light under ultraviolet illumination.

Why it matters

Color, strength, and pattern may contribute to an identification or treatment investigation.

What it does not tell you

Fluorescence alone does not prove identity, treatment, or origin.

Evidence

References

  1. 1
    Analysis of Gemstones at GIA Laboratories

    Gemological Institute of America

    Open source