Diamond Tanning Bed

Why does my diamond ring turn a different color under black light?
When my husband and I got married we didnt have that much money so when we purchased our rings together we didnt get the highest quality which has never been a problem with me. The other day while I was in a tanning bed I looked at my ring and one of the 3 stones in my one ring was bright blue and the other two had no color. In my wedding band two were bright orange, one blue and the rest colorless. We purchased them from a well known jewelry store. Do these changes of color mean they are not real?
Thank you for your responses. The ones that have no color under the UV light, are they not real diamonds?
No no, not at all. Many gemstones turn a different color under different types of light, particularly UV light (as you would encounter from a black light).
This is a physical property called ‘fluorescence’ and is actually a characteristic diagnostic property of many gemstones (such as a blue glow in diamonds). In some gemstones it is very vivid, and in many others it is very dull or completely nonexistent.
_-* Diamond Parachutes *-_
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