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0.708 carat, F VS1 round diamond vs. 0.733 carat, F VS2 round diamond

Hi Danny, I’m contemplating two diamonds with blue fluorescence from the Brian Gavin Blue line, and trying to figure out which one provides the best visual performance and value. One is this 0.708 carat, F-color, VS-1 clarity, round with very strong blue fluorescence, and the other is this 0.733 carat, F-color, VS-2 clarity, round with strong blue fluorescence, which are extremely similar in price. I am intrigued by the idea of the very strong blue fluorescence, and have read that diamonds like this can look lavender blue in direct sunlight and think that sounds cool, but don’t want it to be super obvious. Which Brian Gavin Signature diamond should I buy? – Henry G.

Very strong blue fluorescence in F color diamond:

very-strong-blue-flourescence-f-color-diamond-brian-gavin-104068959034There is a chance that you might be able to detect a hint of lavender blue when viewing a diamond with very strong blue fluorescence in direct sunlight, especially in regions of the country where the sun is stronger. However the presence of very strong blue fluorescence in a diamond like the 0.708 carat, F-color, VS-1 clarity, round from Brian Gavin does not necessarily mean that you will be able to detect lavender blue undertones in the diamond when it is exposed to sunlight, it varies from diamond to diamond, and even the intensity of the ultra violet rays at that particular moment in time can influence the effect of very strong blue fluorescence in an F color diamond.

Even if the diamond does give off a slight hint of lavender blue when exposed to direct sunlight, it will most often be visible from a side profile, and even then only to people who really know what to look for, because it tends to be an extremely subtle characteristic.

In most instances, the only time the difference between strong blue and very strong blue fluorescence will be apparent in an F-color diamond, will be in the diamond grading room when the diamonds are being compared side-by-side under the controlled light provided by the light which we use to grade diamonds for color and fluorescence.

what-do-different-color-aset-mean-brian-gavin-blue-diamond-review-104068959034

I took a moment to compare the 0.708 carat, F-color, VS-1 clarity, round with very strong blue fluorescence, and the other is this 0.733 carat, F-color, VS-2 clarity, round with strong blue fluorescence, side-by-side on a diamond sorting tray at my desk and they look identical to me from a top down perspective, which is how they will usually be viewed when set in a ring.

In terms of the proportions and overall cut grade, these two diamonds are cut so similarly that they could essentially be twins, the only real difference between them is the degree of fluorescence. Both diamonds have the same offset for crown and pavilion angle, and exhibit the same high levels of optical symmetry in the Angular Spectrum Evaluation Technology (ASET) scan that appears on the Diamond Quality Document (DQD) issued by the American Gem Society Laboratory (AGSL) which reflects an overall cut grade of AGS Ideal-0, which is the highest rating available for diamond cut quality. At this level of the game, I honestly feel that you could flip a coin three times and pick whichever diamond wins two out of three tosses and be completely happy with it! Seriously…

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