The “New & Improved” AGS Ideal 0 Cut Diamond:
AGS Ideal Polish +
AGS Ideal Symmetry +
AGS Ideal Proportions +
AGS Ideal Light Performance (NEW)
= AGS Ideal 0
The AGS Light Performance DQD:
The AGS Ideal-0 Light Performance Diamond Quality Document (DQD) pictured above is proprietary to the AGS Laboratory. In other words, it is only available from the American Gem Society Laboratory (AGSL). That’s because they are the only gemological laboratory using Angular Spectrum Evaluation Technology (ASET) to grade light performance.
As a matter of fact, the AGSL has been using ASET since 2005 whereas other labs estimate performance based on the proportions. In addition, the AGS recently began offering Advanced ASET because that provides even more in-depth insight.
The format of the lab report is as follows:
- 1The lab report number or numerical reference to the diamond and corresponding data.
- 2This is the diamond shape and the measurements of the outside diameter and depth of the diamond in millimeters.
- 3The Overall Cut Grade.
- 4The diamond color grade as a numeric value with reference to the GIA equivalent grade.
- 5The clarity grade as a numeric value with reference to the GIA equivalent grade.
- 6The carat weight.
- 7The comments section.
As a matter of fact, the Comments section may be used to declare the fluorescence grade of the diamond. In addition, it may be used to disclose the presence of additional minor clarity characteristics.
In other words, inclusions that are not substantial enough to be noted on the plotting diagram. Such as those indicated in areas 9 and 10 on the lab report. In that case, you might see something like “additional clouds and pinpoints not shown.”
In addition, a notation of the inscription may appear under the comments section if the diamond has been inscribed. Generally speaking, some brands like Brian Gavin Signature diamonds are inscribed with the brand name and diamond grading report number.
In this case, the comments refer to Brian Gavin Diamonds because the inscription reads: “Brian [diamond symbol] Gavin and the number from the corresponding AGS Diamond Quality Document.
Understanding the Proportions Diagram:
8. The proportions diagram is a scale model that shows the profile of the diamond. As a matter of fact, it is based upon the actual proportions of the diamond. In this case, the Brian Gavin Diamonds logo indicates the brand of this particular diamond. In addition, the logo section located above the proportions diagram also includes their tag line “Cut Beyond Brilliant.” To be perfectly clear, this is not a definitive statement being made by the AGS Laboratory.
8a. is the table diameter of the diamond stated as a percent.
8b. is the total depth of the diamond stated as a percent.
8c. is the crown angle of the diamond stated in degrees. Note that the crown height percent is indicated directly across the diagram from the crown angle.
8d. is the pavilion angle of the diamond stated in degrees. Note that the pavilion height percent is indicated directly across the diagram from the pavilion angle.
8e. is the girdle size and finish of the diamond stated in percent.
8f. is the culet size of the diamond. The AGS uses the term “pointed” whereas the GIA uses the term “none” to represent the smallest culet size.
Interpreting the Plotting Diagram:
9. is a plotting diagram that represents the top portion of the diamond.
10. is a plotting diagram that represents the bottom portion of the diamond.
The red star that we placed between the three o’clock position of the upper plotting diagram (9) and the nine o’clock position of the lower plotting diagram (10) represents where the two halves of the diamond are located in alignment with each other.
Thus if a feather were indicated in that region of both the upper and lower halves of the plotting diagrams, it would be located in the exact same region of the actual diamond. As a matter of fact, the three o’clock position of the lower plotting diagram folds under to align with the nine o’clock region of the upper plotting diagram.
The “Key to Symbols (11):
The Key to Symbols indicates the type of inclusions contained within the diamond. The relative position of the inclusions is indicated on the upper and lower plotting diagrams. In this particular instance, the inclusions located within the diamond consist of a cloud.
That is a small cluster of pinpoint size diamond crystals that are located under the table facet of this diamond. In addition, there are a few tiny feathers that are located within the upper half of the diamond that is known as the crown. You’ll see that those are plotted in the six o’clock region of the upper plotting diagram.
In this case, we used light green colored arrows to indicate the location of the inclusions. However, they are indicated in red by the AGS Laboratory on the DQD. In other words, the green arrows are not part of the lab report.
Note that earlier copies of AGS lab reports listed all of the inclusion types beneath the Key to Symbols. Whereas newer AGS lab reports list only the specific inclusions contained within the diamond described on the lab report.
12. Is the AGSL Light Performance Map for the Diamond which is created using ASET. That is an abbreviation for the Angular Spectrum Evaluation Tool that is proprietary to the AGS Laboratory.
It is designed to provide insight into where the diamond gathers light from within the atmosphere. In order to do this, the ASET is built upon a model that is designed to simulate the lighting conditions of our hemisphere.
How to Verify an AGS Diamond Grading Report:
The square bar code which appears in the upper left corner of the Light Performance Diamond Quality Document is a “QR Code.” You can scan the QR Code with the camera on your smartphone to verify the lab report with the AGS Laboratory online.
Alternatively, you can click here to verify a diamond grading report issued by the AGS Laboratory. Then, you’ll enter the lab report number that in this particular instance is 104061350005. IN some case, you might also need to enter the carat weight which is 1.380 carats.
A high resolution of the lab report is available on the AGS website by clicking on the option for Open Report. Then, you can enlarge the size of the report by clicking on the magnifying tool. The tool section appears when you mouse over the blank section to the lower right of the lab report.
If you’re on the Brian Gavin Diamonds website, then you can just click on the link provided to Verify the Lab Report. In that case, the link will open the corresponding diamond grading report located on the server of the AGS Laboratory. Click this link: 1.380 carat, F color, VS-1 clarity diamond from Brian Gavin Diamonds if you'd like to give that a try.
Where to Buy AGS Ideal Cut Diamonds:
As a matter of fact, the majority of diamond cutters are not willing to subject their diamonds to the AGS Light Performance grading platform. That's because it has a tendency to show their diamonds in a bad light. Obviously, that pun is intended.
In that case, it can be difficult to find AGS Ideal-0 cut diamonds. Although that may be true, there is a small handful of dealers who offer AGS Ideal-0 cut diamonds. As a matter of fact, they are the ones who specialize in the niche of ideal cut diamonds. In that case, they have the confidence of knowing that their diamonds are cut to a higher standard:
You're Invited to Use Our Free Diamond Concierge Service:
In the event that you are searching for a diamond, we would like to invite you to use our free Diamond Concierge Service. We have 35+ years of experience in the niche of ideal cut diamonds. As such, we can help you find AGS Ideal-0 Cut Diamonds with the best light performance. Click on the link below and tell us what you’re looking for.