These are the two most respected grading labs in the usa and like to many titans of industry they have an interesting history.
Excellent cut diamond vs ideal.
The gia excellent cut vs ideal cut from ags largely differs in the way they are graded in the lab.
Why is a diamond s cut so important.
The shallow cut diamond is larger at 6 64 x 6 55mm but looks glassy and lifeless without any sparkle.
The ideal cut diamond is used as benchmark for grading all other diamonds.
The ideal cut diamond is what we re after with brilliance and sparkle all around.
For egl stay away from the laboratory.
When choosing a diamond in this range make sure its symmetry and polish are very good or excellent so that the impact of the above average cut is not obscured.
However if you want to have a super ideal cut then take note of these parameters.
An ideal cut diamond is a round brilliant or princess cut diamond that is cut to ideal proportions and angles and has excellent polish and symmetry ratings.
The proportions on the left usually serves a diamond with an excellent ideal cut grade ags is stricter than gia in cut grading.
In the simplest terms a diamond graded as ideal cut will be from ags diamond grading laboratory while a diamond graded as excellent cut will be graded from the gia diamond grading laboratory.
This will quickly tell you what cut grade gia would rate your diamond.
The term super ideal cut is generally used to refer to diamonds like the 0 924 carat f color vs 1 clarity brian gavin signature round hearts and arrows cut diamond which is described on the diamond grading report that appears above.
About 25 30 of these excellent diamonds are not recommended.
Ensure the symmetry and polish of the diamond are either excellent or very good.
The proportions of the diamond are expressed slightly differently and this is one of the differences between the two gemological laboratories.
The reality is that 55 of all round diamonds receive an excellent cut grade from the gia.
For the most brilliance and beauty only consider round brilliant diamonds with an excellent cut.
Ags uses ray tracing and requires tighter proportion ranges while gia uses proportion and human based observation to make the call.
Viewing the diamond sparkle in hd.
For superior brilliance choose a diamond with a cut grade of very good or excellent for round diamonds and good or better in fancy shape diamonds.
The deep cut diamond is smaller 6 17 x 6 21mm and exhibits a lack of sparkle in the center.
