What does it mean if only one diamond glows under a blacklight?

Questions › Category: Ask The Diamond Guy › What does it mean if only one diamond glows under a blacklight?

Dee Doan Staff asked 2 years ago

I have a 1/2 carat tw past present and future ring. While at a bar with my sister she noticed the middle stone of my ring glowed a very bright white/yellow color, but the other two diamonds did not. Is that normal?

1 Answers

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Dee Doan Staff answered 2 years ago

Hi Melinda,
What you witnessed is called fluorescence or a diamonds reaction to UV light. Two out of every three diamonds fluoresce, but just because it did not fluoresce does not mean it�s fake. Fluorescence is not a reliable test for authenticity.
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Toll Free: 1-800-275-4047
Local: 713-222-2728

4265 SAN FELIPE, STE 960
HOUSTON, TX 77027

MON-FRI 9:00am - 5:00pm
SAT 9:00am - 12:00pm
SUN Closed