The Gemological Institute of America, or GIA, is a reputable organization both in the United States and throughout the world. Among many other things, the GIA had developed a diamond grading report. This grading report is used to judge the overall quality of a gemstone and delves into various areas of the diamond qualities to produce the grading report results. In order to learn more about the GIA diamond report, it is important to look at this grading report piece by piece and acquire information on how it is completed by those responsible for doing so.
Part I: The 4 C's
One part of the GIA grading report is to analyze the 4 C's of a diamond. The 4 C's relates to cut, color, clarity and carat. The GIA analysts will pick apart each piece of the 4 C's puzzle and determine the grade of the gemstone based in part on these characteristics. The shape may be listed as a princess cut along with the measurements. The carat will be designated in weight measurements, i.e. a 2.03 carat stone. As for the color of the stone, this may range anywhere from a D to a Z on the GIA report and the clarity may fall within the Flawless to I3 range.
Part II: Additional Grading Information
In addition to the main components of the 4 C's determinations, the GIA grading report will also include additional grading information. One part of the additional grading information is the finish of the diamond, which includes polish and symmetry. Also included under this section of the GIA grading report is a fluorescence category where the GIA grader can list any potential fluorescence noted on the gemstone. These are additional factors which help the GIA grader to make a definitive determination on the grading report and give it a proper designation.
Part III: Reference Diagrams
Also included with a GIA diamond grading report is reference diagrams which pertain to different aspects of the gemstone. The one diagram included with this report shows the shape of the stone in addition to the various facets within it. In addition, there may be various symbols on the gemstone diagram which outline features such as cloud, needle and feather aspects, if there are any on the diamond. Another reference diagram shown on the bottom of the GIA diamond grading report is the proportions of the cut of the diamond. Measurements such as the width and height are shown on the diagram which provides more information regarding the size of the diamond and shape thereof. These diagrams are helpful in showing the buyer just what their stone looks like in measurement form and where the cloud, needle and/or feather aspects may be on the diamond. Since early 2007 all round diamond reports have a cut grade assigned to them.
Disclaimer: All information on this site is provided for informational purposes only! By no means is any
information presented herein intended to substitute for the advice provided to you by any health care or other professional
or organization.
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