AGS0 but HCA 2.8 ????

[est]

Hi Everyone -

You all have been so helpful on this forum! So I thought I''d throw another question your way...

I''m looking at an AGS0 stone (graded Feb 200 but it only scores a 2.8 on the HCA. Is this b/c it''s too deep? Would you pass on this stone or could it be a great one despite being over 2 on the HCA?

2.8 RB
AGS 0
H, SI2 (eye clean)
table: 56.3
depth: 62.3
crown: 34.8 (As best I can read the cert scan, the last number is an 8. I''ve asked the vendor to verify this number since they have a hard copy of the cert)
pavillion: 41.1
cutlet: pointed

Thanks!
est

 

[JulieN]

It happens sometimes.

Ideal Scope?

Price?

 

[Lorelei]

An Idealscope would be very useful in this case, the HCA can penalize a diamond with a steep pavilion angle, so the IS would be good if you can get one.

 

[est]

OK, here are some pics. Please tell me what you think!

40x mag:

 

[est]

IS image. (Note the bit of white at 5 o''clock. Is this a problem??)

 

[Lorelei]

Ok, it looks promising, what I would do is to ask one of the WF experts to evaluate this diamond for you. I am not sure what that white area is , whether it is leakage or glare in the photography, but WF will be completely honest and advise you.

 

[elle_chris]

If this stone already received a 0 for light performance, the only thing i'd worry about is if my version of eye clean is the same as the vendors.

 

[Garry H (Cut Nut)]

Date: 6/24/2008 10:45:00 PM
Author:est
Hi Everyone -

You all have been so helpful on this forum! So I thought I''d throw another question your way...

I''m looking at an AGS0 stone (graded Feb 200 but it only scores a 2.8 on the HCA. Is this b/c it''s too deep? Would you pass on this stone or could it be a great one despite being over 2 on the HCA?

2.8 RB
AGS 0
H, SI2 (eye clean)
table: 56.3
depth: 62.3
crown: 34.8 (As best I can read the cert scan, the last number is an 8. I''ve asked the vendor to verify this number since they have a hard copy of the cert)
pavillion: 41.1
cutlet: pointed

Thanks!
est

The stone is slightly painted which effectively makes it a little shallower on the crown side - so cut wise I would buy and sell a diamond like this with no qualm.

I would ask them to eyeball it though - it is the type of SI2 that worries me - eye clean can be at the expense of lots of small stuff that can dull the brilliance. WF experts will tell you if they think this is a factor - one (good) photo is not enough to go by.

This is an example that people often ask me about - I often prefer an SI2 with a decent grade making inclusion or 3 (even if you might be able to see it in some wierd circumstances), rather than 20 wispy things that are invisible but can interrupt the passage of light.

Hope that helps you and others.

 

[elle_chris]

Date: 6/25/2008 8:58:11 AM
Author: Garry H (Cut Nut)

Date: 6/24/2008 10:45:00 PM
Author:est
Hi Everyone -

You all have been so helpful on this forum! So I thought I''d throw another question your way...

I''m looking at an AGS0 stone (graded Feb 200 but it only scores a 2.8 on the HCA. Is this b/c it''s too deep? Would you pass on this stone or could it be a great one despite being over 2 on the HCA?

2.8 RB
AGS 0
H, SI2 (eye clean)
table: 56.3
depth: 62.3
crown: 34.8 (As best I can read the cert scan, the last number is an 8. I''ve asked the vendor to verify this number since they have a hard copy of the cert)
pavillion: 41.1
cutlet: pointed

Thanks!
est

The stone is slightly painted which effectively makes it a little shallower on the crown side - so cut wise I would buy and sell a diamond like this with no qualm.

I would ask them to eyeball it though - it is the type of SI2 that worries me - eye clean can be at the expense of lots of small stuff that can dull the brilliance. WF experts will tell you if they think this is a factor - one (good) photo is not enough to go by.

This is an example that people often ask me about - I often prefer an SI2 with a decent grade making inclusion or 3 (even if you might be able to see it in some wierd circumstances), rather than 20 wispy things that are invisible but can interrupt the passage of light.

Hope that helps you and others.

Hi Gary- have a question. If the inclusions do interrupt some light passage but the stone received a 0 for light performance, would there be a visible difference to the human eye between that stone light return and let''s say an "IF''?

I''m asking because I thought an AGS0 was a safe bet as far as performance goes.

 

[est]

Thank you all so much for your responses!!!

Gary, your observations were really helpful! That is great news that you don''t think the cut is a problem. Very interesting point about the inclusions, though. I will definitely ask WF if the brilliance is dulled due to the many small inclusions.

BTW, I''ve attached the sarin in case anyone is interested...

I''ll keep you all updated...

est

 

[strmrdr]

Date: 6/25/2008 9:07:30 AM
Author: elle_chris

Hi Gary- have a question. If the inclusions do interrupt some light passage but the stone received a 0 for light performance, would there be a visible difference to the human eye between that stone light return and let's say an 'IF'?


I'm asking because I thought an AGS0 was a safe bet as far as performance goes.

Yes there can be an eye visible difference.
The cut grade is based on a scan of the stone and on rare occasions other factors not considered can effect the light return of an AGS0 diamond.
Cut wise not considering inclusions this combo would be on the edge of the AGS0 grade.
Est have Brian go over the diamond with you on the phone if possible.