Diamond Fluorescence Gia Scale

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.

Diamond fluorescence gia scale.

It is not a grading factor like the gia 4cs color clarity cut and carat weight. Gia studies show that for the overwhelming majority of diamonds the strength of fluorescence has no widely noticeable effect on appearance. In the table up position diamonds of strong or very strong fluorescence appeared to have better color than less fluorescent stones. Gia considers diamond fluorescence an identifying characteristic.

The light emitted lasts as long as the diamond is exposed to the ultraviolet source. 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. What is the grading scale for diamond fluorescence. The gia s fluorescence scale runs from least to most fluorescent.

It delineates how much strength the diamond has against the long wave uv light. 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. 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. However the way you perceive a diamond s color grade may be affected by the extent to.

Diamond fluorescence influences a diamond s color grade fact. 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. A gia study of diamond fluorescence. None faint medium strong and very strong.

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. To reduce the possibility with clarity does not carry very strong fluorescence graded diamonds. 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. None faint medium strong and very strong.

Gia scale uses the following grades to identify fluorescence. Diamond fluorescence is graded on a scale established by gia. Fluorescence is the visible light some diamonds emit when they are exposed to invisible ultraviolet uv rays. The gia found that 25 to 35 percent of diamonds have some degree of fluorescence.

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. Please note that fluorescence seems to visually impact the diamond in about 1 or less of all cases.