Gemscan cert

[utor]

Hey everyone. I found a diamond with these specs

Ct: 1.51
clar: SI2
Color: H
cut: ideal
sym: very good
flor: faint
7.36x7.39

The stone is pretty eyeclean, but you can see tiny crystal formation near the outer edge if you look hard for it.

I''m most worried about clarity and getting paranoid now. Can I trust gemscan''s grading? Is it possible that I''m getting and I1 instead of an SI2?

 

[utor]

I''m probably going to buy this stone. Its getting mounted in a tacori 2620.

diamond: $8000 (can)
ring: $2300

Its a really fair deal if the specs are accurate on the cert.

 

[Garry H (Cut Nut)]

we have very little to go on I am afraid

 

[utor]

Theres no info on depth%, pavilion angles ect., but doesnt "ideal cut" take that all into consideration?

 

[jstarfireb]

The term "ideal cut" is thrown around so much that it has lost a lot of its meaning. It would be a lot more helpful if you could get us the depth, table, and crown and pavilion angles.

 

[utor]

If the return policy is good, I could take it to get independently appraised. And if the diamond isnt good I can return it. Is this the route I should take?

 

[Garry H (Cut Nut)]

Date: 10/5/2008 10:07:06 PM
Author: utor
If the return policy is good, I could take it to get independently appraised. And if the diamond isnt good I can return it. Is this the route I should take?

yes

There is more info on the report than what you gave us - depth in mm for example

 

[utor]

Ok just received the rest of the specs:

depth%: 62.80%
Pavilion Angle: 43%
Crown : 35.80 degree =16 %
Table: 56.50%

What do you guys think?

 

[Garry H (Cut Nut)]

Date: 10/8/2008 7:26:01 PM
Author: utor
Ok just received the rest of the specs:

depth%: 62.80%
Pavilion Angle: 43%
Crown : 35.80 degree =16 %
Table: 56.50%

What do you guys think?

not looking very good, but it would help if we had all the information.
43% pav is not as good as angles (probably around 41 degree)
You can enter your data into HCA under resources at the top right

 

[utor]

Thanks for the reply

I thought these numbers fall within the ideal ranges...at least from what I''ve seen on a few websites. The price is probably pretty fair because I''ve searched online and found GIA diamonds with the same type of spec for $500-1500 more. Gemscan isn''t as reputable, so I''m already conceding that the cut is probably very good as apposed to ideal and the colour might be an I instead of H.

 

[utor]

Sorry it does include degrees

pavilion: 41 degrees, 43%

 

[Garry H (Cut Nut)]

Date: 10/8/2008 10:42:47 PM
Author: utor
Thanks for the reply

I thought these numbers fall within the ideal ranges...at least from what I''ve seen on a few websites. The price is probably pretty fair because I''ve searched online and found GIA diamonds with the same type of spec for $500-1500 more. Gemscan isn''t as reputable, so I''m already conceding that the cut is probably very good as apposed to ideal and the colour might be an I instead of H.

The biggest economic risk is clarity
Re ''ideal cut'' - you should never believe all you read and hear - especially from advertisers and online - your mum and dad should have told you that

 

[utor]

I never believe what dealers are preaching, thats why I''m on here. I''m scared to get ripped off.

Ya the clarity has me paranoid, but it honestly looked pretty eyeclean. You have to be around 2 inches away to see the small crytsal...and you really have to know where it is to spot it. I guess the worse case scenario is that its actually an I1. How much will it drop the value? From what I''ve heard and read I1 have easily identifiable inclusions in plain sight.

Who knew this would be so difficult

 

[Garry H (Cut Nut)]

Date: 10/8/2008 11:41:41 PM
Author: utor
I never believe what dealers are preaching, thats why I''m on here. I''m scared to get ripped off.

Ya the clarity has me paranoid, but it honestly looked pretty eyeclean. You have to be around 2 inches away to see the small crytsal...and you really have to know where it is to spot it. I guess the worse case scenario is that its actually an I1. How much will it drop the value? From what I''ve heard and read I1 have easily identifiable inclusions in plain sight.

Who knew this would be so difficult

1. never ever think that you (all consumers included here) can grade clarity without years of training and experiance.
2. H SI2 is 1.5x more $''s than H I1

 

[utor]

If I insulted you I''m very sorry..I didn''t mean it that way. I was just saying that if the inclusions are not noticeable in plain sight then its more likely to be an SI diamond.

 

[utor]

This diamond was another option and it comes with GIA cert. I plugged the numbers into the cut adviser and it came back as excellent for everything. The only thing that was worrying me was the strong blue fluorescence

Round Brilliant
Measurements: 6.72 - 6.76 x 4.05 mm
Carat Weight: 1.11
Color Grade: G
Clarity Grade: VS2
Cut Grade: Very Good
Proportions:
Depth: 60.1 %
Table: 56 %
Crown Angle: 33°
Crown Height: 14.5 %
Pavilion Angle: 40.6°
Pavilion Depth: 43 %
Star length: 55 %
Lower Half: 80 %
Girdle: Thin to Medium, Faceted
Culet: None
Finish:
Polish: Good
Symmetry: Very Good
Fluorescence: Strong Blue

 

[Garry H (Cut Nut)]

Date: 10/8/2008 11:52:52 PM
Author: utor
If I insulted you I''m very sorry..I didn''t mean it that way. I was just saying that if the inclusions are not noticeable in plain sight then its more likely to be an SI diamond.

Oh, no, you did not insult me - apologies for my abrupt style

The stone you posted will not look good in a ring from very close up - hope someone can explain why - you can read the stuff about this on the link from HCA results

 

[utor]

Which stone? The one I just posted or the original?

 

[stone-cold11]

Garry is commenting on the 2nd stone. Even though everything is in ex in performance from HCA prediction, it falls into the older person''s ring and ear-rings and pendant stone location. That means that the stone will look dark if it is being observed too closely due to head obstruction of incoming light but if view from afar will sparkle like any AGS0 cut grade stone. Usually the vg cut grade on the GIA cert will tip one off on that, GIA and AGS ideal grade are in the younger person ring stone region. Also to note are that HCA prediction is based on the assumptions of a symmetrical and vg polish stone, so this stone with only a good polish grade will take some dings to its performance.

SB Fluor is nothing to be worried about, it is just a personal preference in which the stone will present a slight blue color in the presences of UV light source. Hope that help.

 

[Garry H (Cut Nut)]

thx SC11

 

[stone-cold11]

No Prob, Garry.

Thanks for your HCA, makes understanding the RB cut much easier for me.

 

[utor]

So which diamond will have the best visual performance?

I''m going to ask the dealer to send the 1.51 ideal stone for another appraisal to make sure everything is accurate. If the numbers match up, then the quoted price is fair. Which stone would you guys pick?

 

[stone-cold11]

The 1.1c stone is much better. At least it will shine most of the time, the 1.5c stone will not perform as well. That is all I can say from the numbers.

 

[utor]

thanks for the advice

I messed up. I chose the 1.51 c on the stipulation that if the report came back with good numbers I''d buy it. But the dealer ended up mounting the ring before I could review the numbers. The ring has been custom ordered and sized to fit the 1.51 c. What should I do? I really want the 1.11c now.