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19 Diamonds Help me narrow down the list!

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ace001

Rough_Rock
Joined
Sep 25, 2009
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All of these are GIA or AGS Cert. I know I probably need crown and pavilion % but I need to narrow it down some first. All of these are from different vendors. Some of the notes like lp-0 I have no idea what those mean. Any advice or comments is appreciated

Size Colory/Clarity Cut Pol Sym Depth Table Price Fluro/Notes
1 1.76 hsi2 ex vg vg 61 58 8903 wisp & graining not shown
2 1.71 gsi2 ex vg ex 61.5 58 9175
3 1.70 hsi2 ex ex vg 61.2 58 8826 clouds not shown
4 1.70 hsi2 ex ex ex 61.3 58 9194 GIA inscription eyeclean
5 1.70 gsi2 vg ex ex 62.1 58 9121
6 1.70 hsi2 ex ex ex 61.3 58 9194
7 1.70 hsi2 vg ex ex 60.9 56 8442
8 1.71 gsi2 ex ex 1 62.3 55 9532 Lp-0,Ins,eyeclean,si2+++
9 1.71 hsi2 ex ex ex 61.7 55 9333 F
10 1.71 hsi2 1 1 1 61.1 57 8536
11 1.71 hsi2 1 1 1 61.1 57 8714
12 1.71 hsi2 ex ex ex 61.3 56 9561
13 1.72 hsi2 ex ex 1 61.7 55 9159 Lp-0 Canadian
14 1.76 hsi2 ex ex ex 62 58 9361
15 1.76 hsi2 1 1 1 61.4 58 9335
16 1.79 hsi2 ex ex ex 61.2 55 9025 F
17 1.85 hsi2 ex vg vg 59.6 60 8866 F
18 1.71 hsi2 ex ex ex 61 60 8422
19 1.71 hsi2 ex ex ex 60.6 59 8883
 
Throw out the non eye-clean stones, list the remaining stones, crown and pavilion angles, star and lower half numbers and girdle variation.
 
So I need to contact the vendors and find out which ones are eye clean? what are the star and lower half numbers
 
also what is lp-o
 
Date: 10/6/2009 1:16:58 PM
Author: ace001
So I need to contact the vendors and find out which ones are eye clean? what are the star and lower half numbers
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Yap, SI2 are not all eye-clean, so doing that will eliminate quite a few options out of your list.

Are the stones with the Lp-0 comment AGS graded stone?

Star and lower half numbers are the size of the respective facets. http://journal.pricescope.com/Articles/76/1/Video-Article-The-Parts-and-Facets-of-a-Diamond.aspx

A simple way to get the numbers are to get the exact weight of the stone as listed on the report and the report number and use the report check of the respective lab.

http://www2.gia.edu/reportcheck/index.cfm
http://www.agslab.com/verify_diamond_grading_report.php
 
Yes the Lp-o are from AGS graded stones. Do you think it is safe for me to get an si2 instead of an si1 as long as I make sure it is eyeclean. I could step down to a 1.6 and go with an si1 but I was really wanting a 1.7 or larger. I will be able to inspect the diamond locally before purchasing. I just have to pay shipping if I do not want it.
 
You''ll want to obtain the crown and pavilion angle measurements from the vendors (these are often stated on the lab reports) and then plug the information into the Holloway Cut Adviser here on PS which is available from the Tools menu option above and use it to eliminate potential poor performers from those which are likely to have better visual performance... Then the people here on PS will be able to provide you with a more accurate assessment of the remaining options.
 
Date: 10/6/2009 1:33:31 PM
Author: ace001

Yes the Lp-o are from AGS graded stones. Do you think it is safe for me to get an si2 instead of an si1 as long as I make sure it is eyeclean. I could step down to a 1.6 and go with an si1 but I was really wanting a 1.7 or larger. I will be able to inspect the diamond locally before purchasing. I just have to pay shipping if I do not want it.
Click to expand...

So those are light performance graded 0, ideal grade for AGS but probably got drop in overall cut grade from a less than ideal polish/symm.

If it is eye-clean and has no adverse effect on the optical performance and structurally sound, it is no problem to me. SI1 is not always eye-clean too. Even VS2, some sharp-eyed individual can spot the inclusions, so also depends on your eye-sight.
 
Date: 10/6/2009 1:33:31 PM
Author: ace001


Yes the Lp-o are from AGS graded stones. Do you think it is safe for me to get an si2 instead of an si1 as long as I make sure it is eyeclean. I could step down to a 1.6 and go with an si1 but I was really wanting a 1.7 or larger. I will be able to inspect the diamond locally before purchasing. I just have to pay shipping if I do not want it.
Click to expand...
Ditto Todd with the measurements needed. Some SI2 will be eyeclean, as you can see the diamonds for yourself ask if you can check your selections out away from the store lights, bright jewellery store lighting can be deceptive and inclusions can pop out more in some lights than others. If you are ok with SI2 and you find one which is eyeclean then no reason at all not to go with one. Just a caveat here - if an SI1 or SI2 particularly has clouds plotted on the clarity map as grade setters or says in the comments section " clarity is based on clouds which are not shown" then be cautious as grade setting clouds can sometimes impact performance in SI grades. If you see the comment " clouds not shown" then this is nothing to worry about, just be careful if the clarity grade is caused by clouds.
 
Thanks for the comments

So from my research on the forums depth should be between 60-61 and the table should be 55-58?

I just sent an email to the vendors for cert #''s and to find out which ones are eye clean..
 
Depth from 59-62.7%, table from 54-60% is ok, if the angles work together. Larger or smaller table is a personal preference thing, since you will be able to check them out by eye, no reason to exclude the smaller or larger tables out-right.
 
So before I have a diamond sent in should I request no clouds shown as well as eyeclean
 
Depends on the extent of the clouds and is it a grade setter. Just tell the jeweler you are looking for an eye-clean stone, with no impact on the optical performance and is structurally sound.

When you purchased it, have it send to an independent appraiser to have a look over.
 
Date: 10/6/2009 1:53:16 PM
Author: ace001
Thanks for the comments

So from my research on the forums depth should be between 60-61 and the table should be 55-58?

I just sent an email to the vendors for cert #''s and to find out which ones are eye clean..
Click to expand...

Here are some numbers you can use as a guide.

depth - 60 - 62% - although my personal preference is to allow up to 62.4% ( try not to go deeper otherwise you can lose face up size)
table - 54- 57% ( you can go to 60% max if the critical crown and pavilion angles are within good range - see below)
crown angle - 34- 35 degrees
pavilion angle - 40.6- 41 degrees
girdle - avoid extremes, look for thin to slightly thick, thin to medium etc
polish and symmetry - very good and above

note - with crown and pavilion angles at the shallower ends ( CA 34- PA 40.6) and steeper ( CA 35- PA 41) check to make sure these angles complement in that particular diamond - eyeballs, Idealscope, trusted vendor input - check as appropriate!


As the above implies, configurations depend on each other. A little give here can still work with a little take there.

From expert John Pollard.

With that said, here''s a "Cliff''s Notes" for staying near Tolkowsky/ideal angles with GIA reports (their numbers are rounded): A crown angle of 34.0, 34.5 or 35.0 is usually safe with a 40.8 pavilion angle. If pavilion angle = 40.6 lean toward a 34.5-35.0 crown. If pavilion angle = 41 lean toward a 34.0-34.5 crown.



GIA "EX" in cut is great at its heart, but it ranges a bit wider than some people prefer, particularly in deep combinations (pavilion > 41 with crown > 35).


 
Date: 10/6/2009 2:15:24 PM
Author: ace001
So before I have a diamond sent in should I request no clouds shown as well as eyeclean
Click to expand...
Be cautious with those that have clouds as grade makers, or clouds which are marked on the clarity plot. Also beware in SI grades of " clarity is based on clouds which are not shown" written in the comments section. The thing to keep in mind is clarity is based on clouds is what to watch out for, either as mentioned previously or if the clouds are drawn on the clarity plot.

A commonly seen remark is " clouds not shown", as in these cases the clarity is not based on clouds then not normally an issue.

If you are unsure, post the info here and we can advise.

Cliffs notes: Clarity based on clouds is what to be cautious of in SI clarity grades.

be wary of clouds marked on the plotting diagram of the report, they will also be listed below it and it will say cloud/s if they are present.

be wary of the comment " clarity is based on clouds not shown"

no need to worry if it just states " clouds not shown" as these are not grade setters and only mentioned for completeness.

So if clouds are present as grade makers, check with an appraiser or trusted vendor to make sure these aren't impacting performance, if not then you should be fine.

Appraiser Listing
 
thanks for all the comments. I had no idea to look out for the clouds.
 
Date: 10/6/2009 3:38:35 PM
Author: ace001
thanks for all the comments. I had no idea to look out for the clouds.
Click to expand...
You are most welcome!
 
I got one of the report numbers 5106493080 at 1.79 carat

I was just attach a copy but could not figure out how to.
 
I think I got a pic of the diamond to attach now but not the cert

no name 22.jpg
 
on the cert the crown is 33.5% on one side and 50% on the other. Is this normal?
 
ya, the crown angle is 33.5, the star number is 50%.
 
stone cold did you look at the report that also shows twinning wisps. It also states that additional twinnin wisps are not shown and surface graining is not shown.
 
I can't see the report except the electronic copy.

Anyway, if it is eye-clean, those 2 comments are usually not a problem.
 
Could I email the report to you so you could take a look?
 
Really not much point as you can''t really say much from a clarity plot unless you also have the stone in hand.
 
Date: 10/7/2009 12:13:14 AM
Author: ace001
Could I email the report to you so you could take a look?
Click to expand...
No you cannot do that as it is against forum policy. Ask an experienced vendor or appraiser to assist you there as they are the best people to help you if they have physical access to the diamond.

The comments twinning wisps and surface graining not shown are not normally an issue and are mentioned for completeness. Check carefully that this diamond is eyeclean.
 
The diamond was sold
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On a search again
 
Good luck next time.
 
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