Yellow Diamonds - GIA Fancy Colored Diamond Grading
To maintain a consistent color grading experience for our clients we offer only GIA certified natural yellow diamonds in the 4 main color categories, Fancy Light Yellow, Fancy Yellow, Fancy Intense Yellow and Fancy Vivid Yellow with clarity grades from FL - VS2 (Flawless - Very Slightly Included 2).
With our clients in mind we choose to restrict our offerings to yellow diamonds graded exclusively by the GIA (Gemological Institute of America). The GIA is the most consistent grader and the most widely accepted identification document available in the market today.
GIA has recently introduced some changes to the layout and format of their colored diamond grading reports so we will include examples of the last variations of these reports as they are all still in circulation and it is more than likely that you will encounter them while shopping for a yellow diamond.
The GIA 'COLORED DIAMOND GRADING REPORT' is a full report on the diamond including full grading of clarity level, an inclusion plot of the diamond, full description of proportioning of the diamond and statements of Origin and Fluorescence. This report contains everything you need to know about the diamond.
Let's review the items shown on the GIA Colored Diamond Grading Report:
This is the date that the report was generated. It is not uncommon to find diamonds with reports that are several years old. A diamond may sit in inventory for some time before it is sold from wholesaler to retailer and finally to consumer. This should not be a cause for concern if the date is within the last 5 years. If the report is more than 5 years old you may request that the diamond be recertified or that a duplicate be issued.
Identifies the document as a grading report
Each diamond grading report has a unique identifying number.
Shape and Cutting Style
Describes (in diamondese) the shape of the stone and the particular facet pattern that was employed.
Are the physical proportions of the diamond in millimeters.
Measures the weight of the stone in carats where one carat equals 200 milligrams.
Describes the intensity and color/s of the diamond. A diamond may have more than one color listed such as 'Fancy Blusih-Green'. This would be a diamond whose primary color is Green which also has a secondary color of Blue. The primary color of the diamond is the last color listed.
This describes where the color of the stone originates from. Natural origin means that this is a natural diamond that has not been treated to enhance the color. If the diamond has been treated by means of irradiation or HPHT or any other known enhancement then the report will read 'Treated'.
Describes how even the color is throughout the diamond. Quality colored diamonds will all have 'Even' distribution. The 'Uneven' distribution of color is the hallmark of an inferior colored diamond.
This is a measure of the purity of the diamond and how pure or imperfect the specimen is.
This area of the report includes 4 distinct measurements of the diamond, the Girdle, the Depth percentage, the Table percentage and the Cutlet.
Is the line that is the outer circumfrance connecting the top portion (the Crown and Table) of the diamond to the bottom of the diamond (the Pavillion).
Is a measurement of the proportioning of the diamond, specifically how much of the weight is carried on the underside or Pavillion of the diamond. Each shape has a unique range of values that are the correct proportions for that shape.
Is a measurement of the very top flat surface of the diamond relative to the outer circumfrance of the diamond. Each shape of diamond has a unique range of values that are the correct proportions for that shape.
This is the very bottom point of the diamond where all sides of the Pavillion meet and terminate.
Is an examination of the outer surface of the diamond and how well it has been polished from the natural rough form into a mirrorlike surface. Yellow diamonds do not have to have any more than 'Good' listed under this category, yellow diamonds are not the same as colorless diamonds in this and other respects.
Describes the alignment of the facets of the diamond relative to one another. Yellow diamonds do not have to have any more than 'Good' listed under this category, yellow diamonds are not the same as colorless diamonds in this and other respects.
Is a measure of the level of Fluorescent material present in the diamond. Possible levels are None, Faint, Medium, Strong and Very Strong. We choose to offer yellow diamonds with None, Faint and Medium Fluorescent levels only.
Colored Diamond Scale
A generic 3 dimensional graph which represents the 9 color grading scheme.
The GIA also produces upon request a much more limited version of the colored diamond grading report called 'Identification and Origin Report'
The proportions of the diamond, the Depth and Table percentages, the Polish and Symmetry, the inclusion plot, the Fluorescence and most importantly the Clarity levels are not listed on this report.
We strongly advise that you avoid this type of grading report when considering a high quality yellow diamond purchase. There is no good reason that a high quality diamond would not have a full report.
At Icestore we offer only fully graded natural yellow diamonds with clarity levels of VS2 or higher.
GIA Diamond Report Types Examples
1. Standard Full Colored Diamond Grading Report
2. 'Color Only' Identification and Origin Report
3. Previous Version Full GIA Diamond Grading Report
(Still in high circulation)
4. Previous Version Color Only Identification and Origin Report