What is Diamond Fluorescence?

GIA Diamond Fluorescence Scale

The Gemological Institute of America (GIA) categorizes diamond fluorescence into five distinct grades:​

• None: No fluorescence detected; no influence on color.​
• Faint: Weak fluorescence; minimal impact on color, often barely perceptible.​
• Medium: Noticeable fluorescence; slight influence on color.​
• Strong: Pronounced fluorescence; substantial effect on color.​
• Very Strong: Intense fluorescence; significant impact on color.​

Impact on Diamond Appearance and Value

In certain diamonds, particularly those with strong or very strong fluorescence, a hazy or milky appearance can occur, potentially diminishing the diamond's value. Conversely, in diamonds with lower color grades (e.g., I-M), blue fluorescence can counteract yellowish hues, making the diamond appear whiter and potentially enhancing its value. However, in colorless diamonds (grades D-F), fluorescence might be considered a flaw, as it doesn't counterbalance any color, possibly leading to a decrease in value. ​

Fluorescence in Lab-Grown Diamonds

Lab-grown diamonds can exhibit fluorescence under UV light, similar to natural diamonds. This characteristic is due to trace elements present during the diamond's creation. However, the occurrence and intensity of fluorescence in lab-grown diamonds can vary, and it's essential to consider this factor when selecting a stone. ​

Prioritizing the 4Cs

While fluorescence can influence a diamond's appearance and value, it is generally considered less critical than the primary 4Cs: cut, clarity, color, and carat weight. According to studies by the GIA, fluorescence often has a negligible visual impact on a diamond's appearance. Therefore, when purchasing a diamond, focusing on the 4Cs is advisable. ​GIA 4Cs

Diamond Lab: Merging Love and Craftsmanship

At Diamond Lab, we offer lab-grown diamonds that provide the same brilliance and durability as mined diamonds, without the high price tag or ethical concerns. Our diamonds are certified 100% carbon neutral and are sustainably crafted in Australia's vibrant fashion capital.​

By choosing a lab-grown diamond from Diamond Lab, you can concentrate on the essential aspects of your engagement ring—cut, clarity, color, and carat—while embracing a choice that aligns with your values and desire for exceptional quality.​

For a visual understanding of diamond fluorescence, you might find this video insightful: