Diamond Fluorescence: What is it and How Does it Affect a Diamond’s Value?

When shopping for diamonds, you may have come across the term “fluorescence” and wondered what it means. Fluorescence refers to a diamond’s tendency to emit a soft-colored glow when exposed to ultraviolet (UV) light. It is a natural phenomenon that occurs in about one-third of all diamonds.

The fluorescence of a diamond is graded on a scale of None, Faint, Medium, Strong, and Very Strong. A diamond with a higher degree of fluorescence will emit a stronger glow under UV light, while one with lower or no fluorescence will not show any fluorescence.

So, what does diamond fluorescence mean for a diamond’s value and appearance? Let’s explore this topic in more detail.

The Science Behind Diamond Fluorescence

Diamond fluorescence is caused by the presence of certain minerals and impurities in the diamond’s crystal structure. When a diamond is exposed to UV light, the electrons in these minerals and impurities are excited and emit light, causing the diamond to fluoresce.

The most common mineral that causes diamond fluorescence is nitrogen, which is also responsible for giving diamonds their yellow or brown tint. When nitrogen atoms are present in the diamond’s crystal structure, they can absorb UV light and emit a blue or yellow glow.

How Does Fluorescence Affect a Diamond’s Appearance?

The impact of fluorescence on a diamond’s appearance can be subjective and varies from one diamond to another. Some people may prefer a diamond with no fluorescence, while others may prefer a diamond with a certain degree of fluorescence.

In general, diamonds with lower degrees of fluorescence or no fluorescence appear brighter and whiter under natural daylight, while diamonds with higher degrees of fluorescence may appear cloudy or hazy in certain lighting conditions. This is because the fluorescence can mask the diamond’s natural color and reduce its transparency.

However, some people find that diamonds with strong fluorescence have a unique and desirable appearance, as the fluorescence can give the diamond a slight blue or yellow tint, which can enhance the diamond’s color.

How Does Fluorescence Affect a Diamond’s Value?

Diamond fluorescence can affect a diamond’s value, but the impact is not straightforward. In general, diamonds with no fluorescence or faint fluorescence are considered more desirable and valuable than diamonds with strong fluorescence. This is because diamonds with strong fluorescence may appear hazy or cloudy and may not have as much sparkle as a diamond with no fluorescence.

However, there are exceptions to this rule, and some diamonds with strong fluorescence can be highly valuable and desirable. For example, some rare diamonds, such as the Blue Moon of Josephine, have strong blue fluorescence, which enhances their natural color and makes them highly sought after by collectors.

In addition, the impact of fluorescence on a diamond’s value depends on other factors, such as its color, clarity, cut, and carat weight. A diamond with high color and clarity grades may still be valuable despite having strong fluorescence.

Should You Avoid Diamonds with Fluorescence?

The decision to choose a diamond with or without fluorescence ultimately comes down to personal preference and budget. While diamonds with no fluorescence or faint fluorescence are generally considered more desirable, diamonds with strong fluorescence can be just as beautiful and valuable if they are cut and polished properly.

If you are considering purchasing a diamond with fluorescence, it’s important to examine the diamond under different lighting conditions and angles to determine how the fluorescence affects its appearance. You should also consider the diamond’s other characteristics, such as its color, clarity, and cut, to ensure that it is a good overall value.

Conclusion

Diamond fluorescence is a natural phenomenon that can have an impact on a diamond’s appearance and value. While diamonds with no fluorescence or faint fluorescence are