Advice on OEC stats?

[Green with Envy]

Sorry- no pics... but I came across a vintage OEC that looks beautiful and I am curious if these stats sound like a winner? I guess all the old stones were this deep?

It has a very high crown and is a K color, but face up looks sooooo white- the same as my H color modern RB.

2.24 ct
8.13 x 8.25 x 5.40mm
table: 50%
depth 65.9%
crown height 18.5%
girdle: medium
culet: medium

Finish: good
symmetry: good

clarity: VVS2
Color: K

 

[chrono]

It sounds nice but OECs are all about the pattern. You can''t use HCAs and cut charts for them. Just have to see them or a picture of it. How is the flower pattern? Does it throw off large flashes of colour from the facets under low lighting? Many old stones have minor chipping - how is the condition of this OEC? Any cert? Can you verify the colour and clarity?

 

[Green with Envy]

All those numbers are from the GIA cert so they are exact. I did not notice any chips... but that makes me think with such a high crown... do I have to be worried about chipping it myself once it is set? Didn't think of that before.

I loved the flower patterns and that is what spoke to me... but only saw it in sunlight and showroom lights. When it is that deep should I worry it will look bad under low lighting? My ACA's look almost BETTER in low lighting so I guess all nice diamonds would do the same?

Since I am not used to OEC numbers and have seen stats on so many modern RBs... I am nervous about the diam being so small for a 2.24 ct stone. So much weight is in the depth. I guess THAT is what makes it special, an old hand cut OEC character vs modern stones.

 

[strmrdr]

depth 65.9% crown height 18.5% these balance out very well specially with a 50% table.
With half way decent cutting for the rest of the stone it should rock.

 

[Green with Envy]

Thanks storm for chiming in!

If I read the cert correctly... it has a 37.0 crown angle and 42.0 pavillon angle. Does that say anything more about cut... or do you just have to trust your eyes?

 

[strmrdr]

Date: 9/23/2008 10:23:05 PM
Author: Green with Envy
Thanks storm for chiming in!


If I read the cert correctly... it has a 37.0 crown angle and 42.0 pavillon angle. Does that say anything more about cut... or do you just have to trust your eyes?

does it have the lgf% listed?

 

[LGK]

Not all OECs are so deep, but lots are. If you don''t like the face up size, keep shopping. Still, it sounds like you saw it in person & loved it, so that''s very important, and definitely trumps numbers in old cuts. A GIA certed OEC is a bit hard to find, many are EGL USA or non certed, so that is nice too. I think it might depend on the price, if I were considering it.

 

[strmrdr]

I assumed a 65% lgf% as you can see there might be some darkness under the table if it is optical symmetrical with that combo but that is common to the cut.
Not being optically symmetrical would likely help.
If your eyes love it I say go for it after looking at it under may different lighting conditions!

 

[strmrdr]

Here is the IS you can see some leakage under the table...

 

[Green with Envy]

Except for the basics... I only have the numbers from that diagram they put on the cert. and I have no idea how to read it!

My biggest peeve is dark under the table and this one seemed ok... but I did not look under lots of different lighting.

Could it be that the lower girdle facets are 55%? On the drawing that is the % that correlates with the line that starts at girdle and then stops where the facets stop.

 

[strmrdr]

Date: 9/23/2008 11:08:32 PM
Author: Green with Envy
Except for the basics... I only have the numbers from that diagram they put on the cert. and I have no idea how to read it!


My biggest peeve is dark under the table and this one seemed ok... but I did not look under lots of different lighting.


Could it be that the lower girdle facets are 55%? On the drawing that is the % that correlates with the line that starts at girdle and then stops where the facets stop.

Can you post the report #?
55% is possible but not common.

 

[Green with Envy]

I am trying to post... but it will not compress. I am going to see if I can email admin to post...

 

[strmrdr]

I played around with it and its a twitchy combo there is a lot of possible looks within the GIA rounding of the numbers.
I would look at it in as many lighting conditions as possible then decide.

 

[ericad]

Ditto what LittleGrayKitten said. Let your eyes be the judge and if the price is right, go for it! Old cuts are so unique from each other - no two are the same, so when you find one that speaks to you go after it! It might take a long time to find another one that tugs at your heart the same way.

 

[psadmin]

a little help for green

 

[strmrdr]

The v-thin girdle needs to be checked, how much is v-thin?
What type of setting is going in?

This is within the range of the gia rounding and using the percentages is what it is close to.
This could be a very very nice oec.

 

[strmrdr]

using the GIA angle numbers as is...
My advise is get a profession opinion on the girdle then check it for darkness under the table and if both check out to a reasonable degree buy it.

 

[elmo]

Date: 9/24/2008 5:06:30 AM
Author: strmrdr
My advise is get a profession opinion on the girdle

So many old cuts have very thin to extremely thin girdles and as erica said it may be a long time before you find another one you like. It may be something you have to simply work around if you''re getting an old cut.

 

[diagem]

Karl, its hard to transmit the appearance of an OEC on DC as the character of the Diamond mostly depend on (A) the symmetry and (B) the various facet angle play on one specific stone...

 

[dani13]

Green With Envy-

Sorry to but in, but I was wondering if you ever posted pics of your cushion pendant we talked about and your new eternity band (from Maytal, I think)? I would love to see!! Pretty please????

 

[strmrdr]

Date: 9/24/2008 8:58:18 AM
Author: DiaGem
Karl, its hard to transmit the appearance of an OEC on DC as the character of the Diamond mostly depend on (A) the symmetry and (B) the various facet angle play on one specific stone...

That is true but 37/42 is an unusual combination and DC can give an idea if it can work.
It can, depending on the exact make up.
That is why I keep stressing that the OP use their eyes.

 

[strmrdr]

Date: 9/24/2008 8:37:05 AM
Author: elmo

Date: 9/24/2008 5:06:30 AM

Author: strmrdr

My advise is get a profession opinion on the girdle

So many old cuts have very thin to extremely thin girdles and as erica said it may be a long time before you find another one you like. It may be something you have to simply work around if you''re getting an old cut.

That is true but you need to know what you have to know how much of a work around you have to do.
If 90% of the girdle is v-thin then it needs different mounting than if its a very small part caused by a natural.

 

[Green with Envy]

Dani-

I have a new computer and am having the hardest time trying to make the pictures small enough to upload! I will figure it out and post.

 

[dani13]

Date: 9/24/2008 12:17:55 PM
Author: Green with Envy
Dani-


I have a new computer and am having the hardest time trying to make the pictures small enough to upload! I will figure it out and post.

Ohh...Thanks so much! I cant wait to see!!!

 

[Green with Envy]

pic from dealer...

 

[Harriet]

Date: 9/24/2008 12:17:55 PM
Author: Green with Envy
Dani-

I have a new computer and am having the hardest time trying to make the pictures small enough to upload! I will figure it out and post.

Excuses, excuses. You''ve had the computer for months.

 

[chrono]

Storm's DC simulation looks fairly close to the real thing.

Having very thin girdles is normal for old cut stones. Mine has a very thin girdle too. I would only be concerned if it went into the extremely thin range. To prevent future chipping, I set it low and bezeled it as a just in case.

 

[strmrdr]

You can see there is some leakage under the table but because of the angle cant tell how bad.
This diamond needs to be evaluated in person under multiple lighting conditions.
Even an IS image would not be much help, ASET images at multiple angles might come close to being able to do a remote evaluation.

 

[Green with Envy]

here is a pic next to my whiteflash Aca''s. this stone doesn''t get dark under the table like I have seen lots of them do.

 

[Green with Envy]

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