Diamond Fluorescence

What is Diamond Fluorescence?

Diamond Fluorescence is caused by a phenomenon in which a certain amount of minerals or impurities brings a glow in the diamond when it comes in contact with ultraviolet (UV) light. However, this phenomenon is only applicable to 25-35% of diamonds. The nature of fluorescence, whether strong or minimal, depends on the concentration of elements like nitrogen, boron, or aluminum in a diamond. When concentration is high, the diamond emits a stronger glow and vice-versa.

Fluorescence has a direct impact on the appearance and value of a diamond. While, sometimes the glow makes the diamond look misty under UV lights, downgrading its appearance, and other times it makes the diamond look more natural in normal conditions. This gemological factor is a captivating characteristic of a diamond.

Causes Of  Fluorescence In Diamonds

A natural diamond takes billions of years to take its shape and brilliance. During these billion years, elements like aluminum, boron, or nitrogen were incorporated in a diamond. When this diamond comes under the impact of ultraviolet (UV) light, it causes fluorescence in a diamond. The fluorescence is mainly blue in color. However, colors like yellow, orange, or green can be emitted depending on the characteristics of the element present.

When a diamond comes in contact with ultraviolet (UV) light, the electrons of any of these elements present in a diamond absorb energy. Now, when these electrons want to come to their original (neutral) state they release energy in the form of photons. These are the photons that make natural diamonds glow under specific conditions and this is known as fluorescence diamond.

How Fluorescence In Diamonds Affects Its Value?

Fluorescence has a two-fold effect on the value of diamonds. In some cases, it appreciates the diamond prices, and in some, it downgrades the prices.

Colorless diamonds with higher GIA color grades (D-F) find no buyer if they show a blue or colorful glow under UV light. The reason is simple; here, diamond fluorescence is a flaw. It diminishes the natural brightness of a diamond, making it look hazy. To sell these kinds of diamonds, a seller needs to give excessive discounts.

However, fluorescence can make a diamond premium too. Diamonds with low GIA color grade (I-M) look whiter due to fluorescence. The blue color glow goes well with the yellowish tone of these diamonds, offering them an appearance close to natural white. This puts them under the category of ‘higher quality stones’ and makes them valuable.

Should I Buy A Fluorescent Diamond?

Before buying fluorescent diamonds, evaluate its overall appearance and brilliance under different lighting conditions. Diamonds with lower color grades look more alluring and brilliant due to fluorescence. It enhances their visual appearance and offers them colorless appeal with increased brilliance. But, colorless diamonds with higher color grades get a hazy look due to fluorescence. It reduces their natural brightness and makes them look yellowish in color.

It is a personal choice whether to buy a fluorescent diamond or not. If a diamond becomes more attractive with fluorescence and appealing to the eyes then it is worth buying. Also, prioritize your requirements and budget before buying a diamond.