Why is My Diamond Blue Under UV Light?: 1 Minute to Understand Blue Fluorescence in Diamonds

Diamonds, when exposed to ultraviolet (UV) light, can display a fascinating range of colors due to a phenomenon called fluorescence. A blue glow is the most common, occurring in around 30% of natural diamonds. This bluish hue under UV light is caused by trace amounts of boron or nitrogen within the diamond's crystal lattice. These elements absorb the UV energy and then re-emit it as visible blue light. The intensity can vary from faint to strong, but it generally doesn't affect the diamond's appearance under normal lighting conditions.

Tips 1:

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FAQ

Q: Does blue fluorescence affect my diamond’s value?

A: Generally, blue fluorescence doesn’t impact a diamond’s value significantly, unless it’s very strong, which can make the stone appear hazy.

Q: Is fluorescence unique to blue?

A: No, diamonds can also show yellow, orange, white, or even green fluorescence, but blue is the most common.

Q: Will I see the blue glow in everyday lighting?

A: No, fluorescence is only visible under UV light (like in sunlight or under specific lamps), not in normal indoor lighting.

Q: Is fluorescence a sign of a real diamond?

A: Many natural diamonds show fluorescence, but not all; lack of it doesn’t mean a diamond isn’t real.

Q: Can I request fluorescence when buying a diamond?

A: Yes, gem reports include fluorescence information; discuss this with your jeweler if you want unique glowing effects.