Diamond Grading Help

[helpmefind30]

Hello, I was just curious to ask, If a diamond is certified by a company such as AGS, Would it be of any benefit to the diamond to get it certified by another company as well such as GIA , etc... to DOUBLE ensure the quality of the diamond or no. I plan on getting a very TOP quality diamond and just wanted to make sure I'm getting what I'd like. Thanks in Advance.

 

[smilligan]

Hello, I was just curious to ask, If a diamond is certified by a company such as AGS, Would it be of any benefit to the diamond to get it certified by another company as well such as GIA , etc... to DOUBLE ensure the quality of the diamond or no. I plan on getting a very TOP quality diamond and just wanted to make sure I'm getting what I'd like. Thanks in Advance.

Nope. The only possible reason I could think of for doing that is if you were questioning the color. Apparently, AGS is sometimes a little soft with it's color grading compared to GIA. Other than that, they are both equally great labs with different strengths.

 

[oldminer]

If you get two distinguished and honest labs to grade the same diamond, there is a fair possibility that the grading will not be identical. Now, which one is right? Is there any way to know? Just because one lab grades lower or higher than another on a particular diamond does not mean the harsher grade is more correct. The better grade might be correct. The diamond grading system we use is subjective yet very meaningful to how diamonds are marketed, but it is not an absolute system such as Centigrade or Fahrenheit temperature readings. Both GIA and AGS reports on the very best diamonds D-IF to E-VVS1 are going to be very much the same nearly all the time and two labs reporting on such a diamond would not be of much added value to you or to a diamond dealer. If you are buying a good compromise, such as AGS000 or GIA EXEXEX, F-H color and VVS2 to SI1 clarity, you buy based on overall appeal and value, not on quasi-scientific grading. Using comparison of what is offered for sale accompanied by respected and comparable diamond reports is all that is really necessary to be a relatively astute consumer.

Once you go below the Excellent cut range, then the color and clarity may be of less importance than the cut quality to some extent. Don't be blinded by color and clarity of the cut is not up to a high level. Multiple lab reports won't do you much good on such examples.

 

[c-k]

If you get two distinguished and honest labs to grade the same diamond, there is a fair possibility that the grading will not be identical. Now, which one is right? Is there any way to know? Just because one lab grades lower or higher than another on a particular diamond does not mean the harsher grade is more correct. The better grade might be correct. The diamond grading system we use is subjective yet very meaningful to how diamonds are marketed, but it is not an absolute system such as Centigrade or Fahrenheit temperature readings. Both GIA and AGS reports on the very best diamonds D-IF to E-VVS1 are going to be very much the same nearly all the time and two labs reporting on such a diamond would not be of much added value to you or to a diamond dealer. If you are buying a good compromise, such as AGS000 or GIA EXEXEX, F-H color and VVS2 to SI1 clarity, you buy based on overall appeal and value, not on quasi-scientific grading. Using comparison of what is offered for sale accompanied by respected and comparable diamond reports is all that is really necessary to be a relatively astute consumer.

Once you go below the Excellent cut range, then the color and clarity may be of less importance than the cut quality to some extent. Don't be blinded by color and clarity of the cut is not up to a high level. Multiple lab reports won't do you much good on such examples.

This is a great answer...