Diamond FAQ - Diamonds-USA.com Diamond Guide

The clarity stated in the EGL certificate indicates the current clarity after enhancement was done. This process is well established, and it is in use for more than ten years.
We give a life time warranty for clarity enhanced diamonds and we will fix any problem at our expense. Until today, we have yet to receive a single complaint about our diamonds. With our Clarity Enhanced diamonds the sparkle, reflections, and overall brilliance stays the same as a non enhanced diamond.

The impact of blue fluorescence on price depends on its noticeability.For some higher color stones, fluorescence gives the stone a milky white appearance, which greatly lowers value. In some instances, the fluorescence is hardly noticeable and has minimal impact on the stone's brilliance and value. Fluorescence often adds value to lower color stones as it gives the stones a whiter, brighter appearance. Some buyers regularly pay better prices for highly fluorescent "I" color and lower stones. Yellow fluorescence may require an additional 5 to 10 percent discount. Generally, the higher the quality and price per carat the stronger fluorescence lowers value.

For your information,we do not have any diamonds in stock that are milky or cloudy.

Price adjustments required for blue fluorescenced diamonds:
For "D" to "H" colors:
Very Strong(=very distinct),I.F to VS2: -8% to -12%, SI1 to I3 : -3% to 0%
Strong(=Distinct)I.F to VS2: -5% to - 7%,SI1 to I3: -1% to 0%
Medium(=Moderate)I.F to VS2: -2% to - 4%,SI1 to I3: 0%
Slight to Faint:0%

For "I" to "N" colors:
Strong and Very Strong 0% to +4% !!!
Medium --------------------0% to +3% !!!

The "life" (brilliance & fire) of a diamond is determined mostly by the proportions and the angles of the facets and not by the "Symmetry" or "Polish" grades stated by the EGL or GIA grading reports (certificates).

For example :If a diamond is cut with all facets symmetrical and the final polish of the facets (which can be notified only through a microscope) is perfect the diamond will be graded "Very Good" or better in "Polish" and "Symmetry" BUT if the the Depth% of this diamond will be 54% and the crown angle will be 22 degrees the diamond will look dull and with VERY LITTLE brilliance !! 

The beauty of a diamond is its brilliance called often as " fire" or "life” , it is determined by the diamond's "CUT" and a little by its color. The best brilliance (the reflections of light coming out of the diamond) is achieved by the "Ideal-Cut " diamond, in round diamonds mathematically proven and in other shapes determined by trade thumb rules and visual inspection.
Some people really lose touch of reality and get caught up in the quest for the perfect diamond. A basic understanding of the GIA grading system will ensure that you get the most for your money and don't get taken advantage of, and the "Ideal-Cut' to the "Very Good cut" will ensure you will get a diamond that has the best brilliance.

No one can tell the difference between AGS"0" and AGS"2" or between I.F (FLAWLESS) to a VS2 or between a D to an F color from just looking at a set diamond!!!

GIA Researchers Conduct Study on Round Brilliant Cuts. Researchers at the Gemological Institute of America (GIA) concluded from the results of a study on diamond cut that there is no single best set of proportions for a round brilliant diamond that maximizes fire. The results appear in an article titled "Modeling the Appearance of the Round Brilliant Cut Diamond: An Analysis of Fire, and More About Brilliance," published in the Fall 2001 issue of Gems & Gemology.