Diamond Fluorescence Gia Scale

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.

Diamond fluorescence gia scale.

Please note that fluorescence seems to visually impact the diamond in about 1 or less of all cases. 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. It delineates how much strength the diamond has against the long wave uv light. 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.

What is the grading scale for diamond fluorescence. None faint medium strong and very strong. Diamond fluorescence is graded on a scale established by gia. It is not a grading factor like the gia 4cs color clarity cut and carat weight.

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. However the way you perceive a diamond s color grade may be affected by the extent to. The gia s fluorescence scale runs from least to most fluorescent. Diamond fluorescence influences a diamond s color grade fact.

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. Of all the diamonds submitted to gia for grading approximately 25 to 35 show some. In the table up position diamonds of strong or very strong fluorescence appeared to have better color than less fluorescent stones. 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.

A gia study of diamond fluorescence. According to gia fluorescence is the effect that ultraviolet uv light has on a diamond. The light emitted lasts as long as the diamond is exposed to the ultraviolet source. Gia considers diamond fluorescence an identifying characteristic.

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. To reduce the possibility with clarity does not carry very strong fluorescence graded diamonds. Gia studies show that for the overwhelming majority of diamonds the strength of fluorescence has no widely noticeable effect on appearance. Fluorescence is the visible light some diamonds emit when they are exposed to invisible ultraviolet uv rays.

None faint medium strong and very strong. Fluorescence is an invisible glow that a diamond emits under uv rays.