Diamond Fluorescence Gia Scale

Of all the diamonds submitted to gia for grading approximately 25 to 35 show some.

Diamond fluorescence gia scale. It is not a grading factor like the gia 4cs color clarity cut and carat weight. Diamond fluorescence is graded on a scale established by gia. On a gia diamond grading report fluorescence refers to the strength or intensity of the diamond s reaction to long wave uv which is an essential component of daylight. The gia found that 25 to 35 percent of diamonds have some degree of fluorescence.

Gia considers diamond fluorescence an identifying characteristic. Gia studies show that for the overwhelming majority of diamonds the strength of fluorescence has no widely noticeable effect on appearance. In assigning a diamond color grade gia examines the gem in a highly controlled viewing environment designed to minimize the influence of fluorescence and to produce an accurate and objective assessment of the diamond s color. Fluorescence is the visible light some diamonds emit when they are exposed to invisible ultraviolet uv rays.

None faint medium strong and very strong. What is the grading scale for diamond fluorescence. Gia scale uses the following grades to identify fluorescence. Gia diamond grading reports and diamond dossiers describe a diamond s fluorescence by its intensity none faint medium strong and very strong when compared to masterstones used in the lab.

A study performed in 1997 by the gia found that the level of fluorescence has no widely perceptible effect on the color appearance or transparency of diamonds when viewed table down upside down. It delineates how much strength the diamond has against the long wave uv light. Fluorescence is an invisible glow that a diamond emits under uv rays. The light emitted lasts as long as the diamond is exposed to the ultraviolet source.

Diamond fluorescence influences a diamond s color grade fact. However the way you perceive a diamond s color grade may be affected by the extent to. According to the gia fluorescence is the visible light that a diamond emits when it is exposed to the uv rays the strength and intensity of fluorescence determines its diamond fluorescence gia certification grade. None faint medium strong and very strong.

While there are many false and misinformed opinions on whether the presence of fluorescence in a loose diamond is good or bad it s best to consider the gia s in depth long running scientific study of fluorescence. According to gia fluorescence is the effect that ultraviolet uv light has on a diamond. Please note that fluorescence seems to visually impact the diamond in about 1 or less of all cases. The agsl used to use the grading term inert in addition to none but now they combined the two terms under a negligible fluorescence grade.

The gia s fluorescence scale runs from least to most fluorescent. To reduce the possibility with clarity does not carry very strong fluorescence graded diamonds.