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

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?

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.

The Diamond Guy Helper

The founder and president of Diamond Cutters International, Fred is one of the top diamond experts in the world, as well as a three-time Guinness Book record holder in jewelry design.
Fred The Diamond Guy Helper

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