This page shows the diamond cut grade chart based on AGS (American Gem Society) standards. Diamond cut grading is standardized by both GIA (Gemological Institute of America) and AGS. GIA diamond cut grading is based on girdle thickness, finish and culet size. AGS cut grade chart displayed here is based on light quality, proportion, and finish of the diamond. Feel free to make use of this chart to ensure the quality of diamond you before purchase.
| Cut Scale | |
|---|---|
| AGS | |
| 0 | AGS Ideal |
| 1 | AGS Excellent |
| 2 | AGS Very Good |
| 3 | AGS Good |
| 4 | |
| 5 | AGS Fair |
| 6 | |
| 7 | |
| 8 | AGS Poor |
| 9 | |
| 10 | |
AGS (American Gem Society) and GIA (Gemological Institute of America) have different standards for diamond cut grading which have only a very little difference in their scales. This AGS cut grade chart rates the diamond from ideal to poor.
