Only about 25% to 35% of diamonds show any degree of fluorescence when exposed to long-wave UV light. Over 95% of these diamonds have a fluorescent blue color. Fluorescence in diamonds is the brightness that can be seen when the diamond is under ultraviolet (UV) light. GIA rates diamond fluorescence as None, Weak, Medium, Strong and Very Strong.
When a diamond is exposed to ultraviolet light, it can emit a shine in different colors. Blue is the most common fluorescent color in a diamond, but other colors such as yellow, green, red, white, and even purple may be seen. Fluorescence can improve the color of diamonds with lower color grades (H and below). A faint yellow tint in diamonds below H can be counteracted by a medium intensity blue fluorescence, making it appear whiter.
A question we hear quite often is: why do some diamonds glow when they are in black light? This phenomenon is called fluorescence and it occurs due to certain chemical impurities within the diamond composition. It is perfectly natural for a diamond to fluoresce and look blue under UV light. Depending on the specific recipe and the alloys used in the cultivation process, laboratory diamonds may show rarer fluorescence colors compared to natural diamonds. When buying diamonds with fluorescence, Brian Gavin is a retailer known for its unique super-ideal cut diamonds.
Understanding the different types of rhinestones can help couples decide if they really want a natural diamond or if an artificial stone is suitable. Some sources say that blue diamonds could be real, while others say that if a diamond turns blue, it's not of high quality. Another practical benefit of buying a diamond with fluorescence is that it can help improve the color appearance of diamonds in the lower color ranges. By knowing how to check the authenticity of a diamond, couples can protect themselves from unscrupulous people and find a gem they cherish, whether it's a natural diamond or not. Fluorescence can cause diamond to shine brighter than a diamond that lacks fluorescent properties.
The diamond may appear to glow purple under a black light because the source itself looks a little violet.