What is Fluorescence in a Diamond?

Gem-quality diamonds that emit light when exposed to long-wave ultraviolet light.

What are the Gradations of Fluorescence set by the Gemological Institute of America?

• N: No Fluorescence
• F/FB: Faint/Faint Blue Fluorescence
• SL: Slight Fluorescence
• S: Strong Fluorescence
• EF: Extreme Fluorescence

If you need further explanation on this topic:
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Why is Fluorescence Bad for a Fine-Quality Diamonds?

Fluorescent diamonds, especially the extreme rare cases known as overblues, give a diamond a visible haziness that undervalues them on the market.

They appear almost cloudy in light with strong ultraviolet content, which compromises their clarity and decreases their appeal.

Why is Fluorescence Good for Diamonds of Lesser Worth

Strongly fluorescent diamonds with yellowish body color have the appearance of better, whiter color in sunlight, a source of ultraviolet light.

These lower-color diamonds with powerful fluorescence often command a premium.

This is one of the areas where DiscountJewels.net can help you make an intelligent assessment. The degree of Fluorescence can substantially influence the value & the price of a diamond.

Michael at discountjewels.net is properly qualified to advise you in this area.

Call or Fax DiscountJewels.net at 713 721-8828
Email michael@discountjewels.net

Fluorescence Put to the Test by GIA

Fluorescence in diamonds is considered rare. 65% of diamonds have none.

Strongly blue fluorescent diamonds possessed better color grade in the face-up position.

No fluorescent effect was observed in the table-down position, which is how labs color grade diamonds.

Color fluorescence was more apparent in diamonds grades I through K.

Strongly or very strongly fluorescent diamonds were considered to have better color appearance than less fluorescent stones.

Blue fluorescence had little effect on transparency.

Overblues are rare, so they were not included in the GIA study.

The GIA conclusion: fluorescent diamonds are stigmatized needlessly, which puts a negative impact on their salability.

Fun factoid: The famous Hope Diamond fluoresces an extremely unusual red-an occurrence in blue diamonds-and this has influenced the legend of its curse.

Michael at Discount Jewels will help you with further explanations on the subject of Fluorescence.

Call or Fax DiscountJewels.net at 713 721-8828
Email michael@discountjewels.net

Courtesy of Mondera