What Exactly Does GIA Excellent Cut Grade Mean?

Why Are Two 1.50ct J VS2 GIA Excellent Cut Diamonds Almost $1500 Difference In Price?

Q:

Hi Liz,

Great website! Can you help me with some diamond suggestions? Here are the details of what I’m looking for:

Shape: Round Diamond
Color: H/I/J
Clarity: VS2/SI1/SI2
Carat: 1.5ct
Cut: Excellent/Ideal
Budget $10K

I am most concerned about the diamond being eye-clean. I also don’t want to see any noticeable yellow tint. I looked at some J color ideal cut diamonds this weekend and they looked fine to me but I have also seen some I color diamonds which showed some yellow tint. I want to ensure they look near colorless.

Thanks,

Keith

A:

Hello Keith,

Thank you for contacting me and letting me know your diamond requirements and budget.

To address your first concern, I only recommend diamonds that are ‘eye-clean’. Depending on your color sensitivity you may be able to detect some color in a “J” diamond from the side-view or pavilion angle. As you know, ideal cut diamonds reflect the maximum amount of light thereby facing up visually bigger and brighter. As long as you stick with an ideal cut diamond a J color will not be an issue.

1.52ct J VS2 GIA Excellent Ritani

1.52ct J VS2 GIA Excellent and eye-clean cut diamond from Ritani

If you are looking to maximize carat weight for your budget, I recommend the following diamond: http://www.ritani.com/diamonds/round-diamond-1-52-Carat-J-color-GIA-certified/D-Z1NSJM

This is a gorgeous 1.52ct J VS2 for $9,381.00 available at Ritani. There is a nice HD video that shows this 1.52ct from all angles and the magnified image shows no obvious visual inclusions. It is graded Excellent by the GIA but has ideal cut proportions. I would say this is an excellent choice for you.

Please let me know what you think and if you have any questions about this diamond or anything else.

Kind Regards,

Liz

Q:

Thanks Liz. I did a quick search and found this diamond for $7,908.00 what do you think? Sames specs as the one you recommended but more than $1k cheaper. http://www.ritani.com/diamonds/round-diamond-1-56-Carat-J-color-GIA-certified/D-ZYH1HQ

Keith

A:

Hi Keith,

The 1.56ct J VS2 that you have chosen has no actual magnified picture of the diamond (the picture on the website is a stock/sample image). I still prefer the first stone for you as the cut is better.

Kind Regards,

Liz

Q:

Hi Liz,

I totally understand the need for a diamond picture however this diamond has an “excellent” cut rating. If both stones are graded ‘excellent’ is there a specific reason you don’t think the second choice is good?

Keith

Evaluating Diamond Cut Grade Is A Somewhat Involved Process

A:

Hi Keith,

Evaluating diamond cut grade is a somewhat involved process. GIA has certain criteria that allows certain diamonds with various cut dimensions to fall within their “Excellent” cut range. There are GIA excellent stones out there that actually aren’t cut very well. This is because GIA has a larger range of proportion sets that allow for greater variance in stone cuts. AGS however is very particular and therefore make it a bit easier to shop for diamonds using their ‘ideal’ cut grade standard. Furthermore, the angles and measurements on any diamond grading report are meant to be used as a guide, not the ultimate seal of approval. These numbers are averaged out. For example, the pavilion angle is one of the most critical angles when considering how well a stone reflects light back through the crown. In the lab, the technician measures the entire circumference of the stone and comes up with an average. This average is what is listed on the report, however this doesn’t necessarily mean that the stone is cut symmetrically all the way around (the symmetry on the report does not refer to this. Symmetry is the overall appearance of the stone; for example the concentric positions of the table and culet for a round stone).

Your second diamond from Ritani is indeed a GIA Excellent cut grade but wouldn’t make it as part of AGS’s ideal cut grade. It is cut slightly too deep and therefore the price difference of nearly $1500.00. There is always a reason why a diamond is priced as it is. When it comes to buying diamonds, investing in cut (brilliance/bling/sparkle) is really what matters most.

I hope this clears up some questions for you. Please let me know if I can help out further.

Kind Regards,

Q:

Hi Liz,

Thanks for the detailed explanation! I had no idea diamond cut was so detailed! I’m going to talk to Ritani about your recommended 1.52ct J VS2. Thanks again!

Keith

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