AGS or GIA Graded Diamonds?
By virtue of having created the diamond grading system that is used in one form or another by all the serious labs in the world, GIA has by far the greatest reach of any lab on the planet.
It is held in very high regard and trusted by millions of diamond consumers and businesses worldwide. However, in the area of cut grading GIA was late to the party and continues to lag behind, and that has fueled the demand for the services offered by the AGS Laboratories.
As mentioned, AGSL uses essentially the same grading methodology as GIA for color and clarity, and has established practices to maintain consistency with GIA standards.
For instance, both labs use master color sets for grading diamond color. The master sets used by the AGSL are graded by GIA and assembled according to the strict standards GIA has established for their use.
AGSL has developed the only scientifically vetted system for analyzing cut quality and light performance in diamonds. The beauty of the AGSL system is that it can be applied across multiple diamond shapes and facet arrangements. Today, in addition to rounds, AGSL offers cut quality reporting on princess, oval, Asscher, and several proprietary diamond shapes.
Other shapes will eventually be added to the list. In contrast, GIA offers an overall cut assessment only on round brilliant diamonds and has announced no near term plan to roll out cut grading on any other shape.
If a diamond holds a certificate from either company, the value of the stone will increase as it is confirmation of its authenticity. In turn, this helps them sell instead of gemstones that aren’t certified. Think about this: Would you buy a certified diamond or non-certified diamond? I think the answer is pretty obvious.
Assessing Cut Quality In Round Diamonds
In a round brilliant cut, there are a total of 57 facets which all work together in a complex relationship to influence how light moves within the diamond.
In spite of the fact that the round cut brilliant is probably the most popular diamond shape on Earth, the HCA is limited to it – that is, it cannot be considered a generalized tool for use on other fancy shaped stones.
It assesses features that are closer to the actual visual experience a diamond provides than what you could extract from taking a look at the different color, cut or clarity grades (even though it is only connected to cut from the list of 4Cs).
Why Choose AGS or GIA?
For more information on the differences of GIA vs AGS, visit the link here. Zero is known in the diamond world as ideal and the AGS ideal grading of 000 is a well known term in the world of superbly cut stones. After GIA, they are now one of the main market leaders in the diamond cut industry.
Both GIA and AGS provide eight different measurements of the round brilliant stone in their reports. These aspects include; the crown, pavilion angle, pavilion depth, table diameter, girdle thickness, culet size, polish and symmetry.
AGS attempts to make itself seem more refined with their “ideal” cut grading system. The truth is that there are not many differences between the two of them except the way they name and perform their cut grading.
Choose cut quality certificates come from a renowned institute that takes its work seriously. If you are taking yourself seriously, going with diamonds verified by the American Gem Society would be a rather clever option.