2023年7月18日 · GIA Diamond Grading Reports and Diamond Dossiers describe a diamond’s fluorescence by its intensity under long-wave UV light (None, Faint, Medium, Strong and Very Strong). If the fluorescence is Medium, Strong, or Very Strong, the …

2024年12月7日 · Faint Fluorescence: Of the 9,175 diamonds with fluorescence, 3,465 (38%) had faint fluorescence, considered the lowest level of blue fluorescence (faint, medium, strong, or very strong blue). Medium to Strong Fluorescence: 5,710 diamonds (62%) displayed blue fluorescence at intensities from medium to very strong.

2018年3月27日 · FACT: Diamond fluorescence is not one of the 4Cs – like color, clarity, cut and carat weight – which describe the quality of a diamond. GIA considers fluorescence an identifying characteristic – additional information that helps distinguish one diamond from another.

Cloudy or milky effects are most common in strongly fluorescent diamonds but can also occur in diamonds with medium fluorescence. It's very rare, however, to find it in faintly fluorescing diamonds. Cloudiness is more common in higher color grades, so it's best to avoid strong and medium fluorescent diamonds in D, E, and F color diamonds.

2023年12月11日 · Diamond fluorescence refers to the glow a diamond emits under ultra-violet (UV) light, often seen as a blue hue. The GIA has five fluorescence grades: None, Faint, Medium, Strong, and Very Strong. While 30% of diamonds exhibit this glow, its impact varies: it can enhance a diamond’s color or cause a hazy appearance.

Faint: Diamonds with Faint fluorescence exhibit a very slight amount of fluorescence. It is usually not detectable to the unaided eye, and can emit a very subtle blue hue under UV light. Medium: Diamonds with Medium fluorescence will have a stronger blue glow under UV light.

2024年1月30日 · Faint: A weak presence of color in the diamond, but barely noticeable. Medium: A slight hint of fluorescence in the diamond. Strong or Very Strong: Significant, observable fluorescence in the diamond. Is Diamond Fluorescence Important? Not necessarily.

Some diamonds may have very faint fluorescence that is only noticeable under strong UV light, while others may have strong or very strong fluorescence that is more readily noticeable. So in short, most diamonds either do not fluoresce at all, or their fluorescence is so subtle that it requires a specialized UV light source to detect.

Diamond fluorescence is a fascinating and often misunderstood characteristic of some diamonds. This guide aims to provide an in-depth understanding of diamond fluorescence, its causes, how it's graded, its impact on a diamond's appearance and value, and tips for making an informed decision when purchasing a diamond.

2022年1月5日 · Every GIA diamond grading report contains a part dedicated to fluorescence. The official scale has five degrees: none, faint, medium, strong, very strong. None. If you see “none” in a diamond grading report, it means it doesn’t have fluorescence. Faint. The diamond is fluorescent, but not to a significant degree.