The Science of Fluorescence
When we talk about diamonds glowing under black light, we're referring to a phenomenon called fluorescence. Fluorescence occurs when a diamond absorbs ultraviolet (UV) light and then emits it as visible light. This is what can cause a diamond to appear to glow when exposed to black light, which is a source of UV light.Do All Diamonds Fluoresce?
Not all diamonds fluoresce. In fact, only about 25-35% of diamonds exhibit some degree of fluorescence. The presence and strength of fluorescence in a diamond are noted in its grading report. Fluorescence can range from "None" to "Very Strong," with varying degrees in between.The Colors of Diamond Fluorescence
The most common color of fluorescence in diamonds is blue. However, diamonds can also fluoresce in other colors, such as yellow, white, or even green. The color of fluorescence does not necessarily affect the diamond's overall appearance in normal lighting conditions.The Impact of Fluorescence on Diamond Appearance
- None to Faint Fluorescence: Diamonds with none to faint fluorescence typically show no noticeable effect under normal lighting conditions.
- Medium to Strong Fluorescence: Diamonds with medium to strong fluorescence may appear slightly hazy or oily in sunlight, which can impact their transparency and overall appearance.
- Very Strong Fluorescence: Diamonds with very strong fluorescence can sometimes appear overly blue or milky, especially in daylight, which can affect their value.
Factors Influencing Diamond Fluorescence
- Presence of Trace Elements: The fluorescence in diamonds is often caused by the presence of trace elements, such as boron or nitrogen, within the crystal structure.
- Crystal Structure: The way a diamond's atoms are arranged can also impact its ability to fluoresce under black light.
Identifying Fluorescent Diamonds
If you're curious about whether a diamond has fluorescence, there are a few ways to find out:- Certification: Many diamond certifications, such as those from the Gemological Institute of America (GIA), will include information about a diamond's fluorescence.
- Inspection Under UV Light: Jewelers can use a UV lamp to check for fluorescence in a diamond.
Does Fluorescence Affect Diamond Quality?
There's a common misconception that fluorescence negatively affects a diamond's quality and value. However, this is not always the case. In fact, fluorescence can sometimes enhance the appearance of a diamond, making it appear whiter or more vibrant under certain lighting conditions.Is Fluorescence Good or Bad?
Fluorescence in diamonds is a matter of personal preference. Some people enjoy the unique glow that fluorescent diamonds exhibit under UV light, while others prefer diamonds with no fluorescence. It's important to note that fluorescence does not impact the structural integrity of the diamond.Choosing the Right Diamond for You
When selecting a diamond, consider the following:- Personal Taste: Decide whether you like the effect of fluorescence in a diamond.
- Lighting Conditions: Think about the lighting conditions in which you'll most often wear the diamond. If you're often in environments with UV light, fluorescence might be more noticeable.
- Budget: Diamonds with strong fluorescence are sometimes priced lower than those with no fluorescence, so they can be a good option if you're looking for value.