Suggestions on GIA G SI1

[phantom100]

I found a diamond on pricescope for a great price but wanted to get everyone's opinion.

1.51 G SI1 VG. Measurements:7.29x7.33x4.60 depth 62.9%, table 55%
HCA score 3.6-VG

My main concern is that it has an "extra facet". The certificate is here:
http://images.b2cjewels.com/Images//Certificate//6225751.pdf

Anyone have any advice?

Thanks!

 

[Gypsy]

Yes. Pass.



The entire purpose of faceting a diamond is to reflect light.
How well or how poorly a diamond does this determines how beautiful it is.
How well a diamond performs is determined by the angles and cutting. This is why we say cut is king.
No other factor: not color, not clarity has as much of an impact on the appearance of a diamond as its cut. An ideal H will out white a poorly cut F. And GIA Ex is not enough. And you must stick to GIA and AGS only. EGL is a bad option: [URL='https://www.pricescope.com/community/threads/egl-certification-are-any-of-them-ok.142863/']https://www.pricescope.com/community/threads/egl-certification-are-any-of-them-ok.142863/[/URL]
So how to we ensure that we have the right angles and cutting to get the light performance we want?
http://www.pricescope.com/wiki/diamonds/diamond-cut
Well one method is to start with a GIA Ex, and then apply the HCA to it. YOU DO NOT USE HCA for AGS0 stones.
http://www.pricescope.com/wiki/diamonds/holloway-cut-advisor
The HCA is a rejection tool. Not a selection tool. It uses 4 data points to make a rudimentary call on how the diamond may perform.
If the diamond passes then you know that you are in the right zone in terms of angles for light performance. Under 2 is a pass. Under 2.5-2.1 is a maybe. 2.6 and over is a no. No score 2 and under is better than any other.
Is that enough? Not really.
So what you need is a way to check actual light performance of your actual stone.
That's what an idealscope image does. http://www.pricescope.com/wiki/diamonds/firescope-idealscope
It shows you how and wear your diamond is reflecting light, how well it is going at it, and where you are losing light return. That is why you won't see us recommending Blue Nile, as they do not provide idealscope images for their diamonds. BGD, James Allen, GOG, HPD, ERD and WF do.

The Idealscope is the 'selection tool'. Not the HCA.
So yes, with a GIA stone you need the idealscope images. Or you can buy an idealscope yourself and take it in to the jeweler you are working with to check the stones yourself. Or if you have a good return policy (full refund minimum 7 days) then you can buy the idealscope, buy the stone, and do it at home.


Now if you want to skip all that... stick to AGS0 stones and then all you have to do is pick color and clarity and you know you have a great performing diamond. Because AGS has already done the checking for you. That's why they trade at a premium.

 

[Dancing Fire]

I found a diamond on pricescope for a great price but wanted to get everyone's opinion.

1.51 G SI1 VG. Measurements:7.29x7.33x4.60 depth 62.9%, table 55%
HCA score 3.6-VG

My main concern is that it has an "extra facet". The certificate is here:
http://images.b2cjewels.com/Images//Certificate//6225751.pdf

Anyone have any advice?

Thanks!

Too deep!...

 

[Andelain]

I found a diamond on pricescope for a great price but wanted to get everyone's opinion.

1.51 G SI1 VG. Measurements:7.29x7.33x4.60 depth 62.9%, table 55%
HCA score 3.6-VG

My main concern is that it has an "extra facet". The certificate is here:
http://images.b2cjewels.com/Images//Certificate//6225751.pdf

Anyone have any advice?

Thanks!

My main concern would be the ****ty light return.

 

[phantom100]

Thanks for the tip! I won't consider that one anymore.
Here is another one I am interested in.

This one is a 1.60 H SI1
Measurements 7.47x7.43x4.64
62.3% depth, 57% table, 36° crown angle, 40.6° pavilion angle
This has a HCA Score of 1.9

I'll ask for Idealscope images but not sure if I can get them.

 

[Gypsy]

If eyeclean, much better.

Ask for idealscope.

Also, is their fluorescence? If there is make sure to ask if the stone is overblue.

 

[Gypsy]

.

 

[phantom100]

They will let me order it and take the idealscope and pictures before shipping it out, so I'll do that. It has Faint fluorescence so that means I don't have to worry about that right?

 

[phantom100]

That diamond ended up having terrible clouds so it was a no-go but I have another one I am considering I'll post in another post.