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By Sam Thomas

What is Diamond 'Fluorescence'?

01 March 2024

Understanding Diamond Fluorescence

In the glittering world of diamonds, ‘diamond fluorescence’ is as intriguing as it is misunderstood. This attribute of diamonds, often overlooked and sometimes underappreciated, can affect a diamond's appearance under certain lighting conditions. But what exactly is diamond fluorescence, and how does it influence the allure of these precious gems?

Diamond fluorescence refers to how diamonds react when exposed to ultraviolet (UV) light. This reaction causes them to emit a soft glow, usually blue, which is invisible under normal lighting conditions. It's a natural characteristic for some diamonds, attributed to the presence of certain elements like boron within the stone.

The Glow from Within: Fluorescence in Diamonds

When discussing fluorescence in diamonds, it is crucial to note that not all diamonds exhibit this trait. The Gemological Institute of America (GIA) grades fluorescence intensity as None, Faint, Medium, Strong, and Very Strong. While a strong fluorescence can make a diamond appear whiter than its colour grade suggests, it can also cause the stone to seem hazy or oily in rare cases.

The 4C's - Diamond Education

What is Diamond Fluorescence's Effect on Value?

The impact of what is diamond fluorescence on a diamond's value is a subject of much debate. Traditionally, diamonds with no or faint fluorescence are preferred for their purity and lack of reaction under UV light. However, some appreciate the unique character and potential value proposition of a diamond with medium to strong fluorescence.

Navigating the Glow: Choosing a Fluorescent Diamond

What is fluorescence in diamonds should not be a deterrent but rather a factor to consider based on personal preference. For those who value the subtlety of a diamond's reaction to UV light, a fluorescent diamond can offer a distinctive beauty not found in non-fluorescent stones. It's an aspect that adds personality to the diamond, making it stand out in specific environments.

The Luminous Allure

In the realm of fine jewellery, understanding the nuances that make each diamond unique is critical to appreciating its beauty. Diamond fluorescence is one such feature that, far from being a flaw, can contribute to the stone's unique story. Whether you're captivated by the idea of your diamond softly glowing in sunlight or prefer the traditional sparkle, recognising what diamond fluorescence is enriches the journey of selecting the perfect gem. At Paul Bram, we celebrate the individual story of each diamond, guiding our clients to find the piece that resonates with their personal taste and story.