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Different HCA on the same diamond?!

N

NYC2012

Rough_Rock
Joined
Oct 25, 2007
Messages
20
Hi!

I am looking at this diamond from GOG:

http://www.goodoldgold.com/diamond/8920/

It looks like the pavillion angle is different on the different report views.

On the GOG listing to the right of the picture, it is 41.08. At first I entered it in the HCA tool as 41.0 (only allows 3 digits) and the HCA came out below 2 and excellent. Realizing I should round off, I put it in as 41.1 and then the number jumped all the way to 2.3.

Looking at the AGS view, it is listed as 41.2 ?! That made the number even worse. But if you click to the full AGS report below, its 41.0.

I am confused :(

In general we are looking for a diamond around 2.5 carats, I think G, H or I, VS1-SI1.

Thanks so much in advance, I am already receiving so much help from these boards!
 
NYC2012|1323021997|3073967 said:
Hi!

I am looking at this diamond from GOG:

http://www.goodoldgold.com/diamond/8920/

It looks like the pavillion angle is different on the different report views.

On the GOG listing to the right of the picture, it is 41.08. At first I entered it in the HCA tool as 41.0 (only allows 3 digits) and the HCA came out below 2 and excellent. Realizing I should round off, I put it in as 41.1 and then the number jumped all the way to 2.3.

Looking at the AGS view, it is listed as 41.2 ?! That made the number even worse. But if you click to the full AGS report below, its 41.0.

I am confused :(

In general we are looking for a diamond around 2.5 carats, I think G, H or I, VS1-SI1.

Thanks so much in advance, I am already receiving so much help from these boards!
Click to expand...

remember that there is some allowable error in scanning. also remember that the HCA is a good rejection tool but not a selection tool. the HCA is useful when you do not have idealscope/ASET/other images...in this case the HCA doesn't matter because you have the ASET and DiamXray which do not show leakage. if this is eye-clean, looks like a great diamond!
 
In addition to what slg said, you don't need to use the HCA at all on a stone that gets AGS0 (ideal) on light performance. The HCA is useful particularly for GIA Excellent stones because some are better than others, and GIA Ex is a broader range than AGS Ideal.

That is a gorgeous stone. It has already been analyzed for you! As I think I said on the other thread, the only factors are whether this is the size, color, and clarity that you want.
 
slg47|1323026056|3074008 said:
NYC2012|1323021997|3073967 said:
remember that there is some allowable error in scanning.
Click to expand...
Click to expand...

I would not say "allowable" and not even acceptable.
GOG have a Helium scanner and I think the 41.08 is from that device.
The accuracy of that device is greater than the others.
AGS have a Helium but only use it in their R&D studies I believe.
 
Got it! I thought I was doing my due diligence, but I LOVE that I can just come on here and be told if the stone is good! As diamondseeker has already told me I need to see if the clarity and color is good for me. Thank you, thank you!

I was going more for a G or H, and VS1 or VS2 (which I read is better for over 2 carats). Looking at a lot of stones on James Allen, I was surprised that many of the VS2s had more inclusions that this one from GOG. It just matters how visible they are?

Thanks again!
 
The images look quite good on this stone! Light performance is thus not an issue.
 
You can't go by the inclusion plots to judge how clean the stone will appear to your eyes. Those red marks can be scary! But some inclusions are very hard to see, even with a loupe! A VS2 should be cleaner in reality than an SI1. But a good SI1 can be a great value! People vary on color tolerance, so that is impossible for any of us to advise you about, other than to see it for yourself! You are fortunate to be able to do so!
 
Yes the red marks are scary lol!

We are anxiously waiting to call GOG when they open tomorrow to set up a time to see the stone.

Meanwhile we called James Allen to set up a time with them, to view stones that we see online that are of interest. I'm looking online but this is not fun for me, plugging in the HCAs, trying to determine which is a value, which is a good cut stone. If anyone sees one they want to recommend, I am all open to suggestions!

Thanks again!
 
I'd probably just ask Good Old Gold to call in a couple of others for you to look at in addition to the one they already have. I'd get them to call in an H color just so you can compare. All of their superior stones and most of the premium are going to be great stones. They have already been tested for light performance so I don't even put theirs into the HCA.

At James Allen, the True Hearts are usually safe. Ones with AGS0 (ideal in light performance) should be safe. GIA ex stones are the ones that have to be put in the HCA. And as you can see of the pictures of their stones, they have a lot that you can just look at and tell that the symmetry is off.
 
Great help as always, thank you.

I am having a hard time looking at the pics and telling what is off lol, apparently my diamond skills are very novice. The pics are all different and strange and one that I think looks bad turns out to be this excellent expensive stone.

Anyways, I will focus on the AGS0 and True Hearts. But I am really anxious to speak with GOG.
 
I am biased because I love GOG! I have had the very best experience there. I envy you getting to go to their store! let us know what happens after your visit!
 
Well it looks like I am going on Friday :)

My only disappointment is that they don't have anymore rounds in the 2.5ish range to show, as I guess they are extremely hard to come by in the size? It seems like JA has so many (but not as good quality maybe?) and I was surprised since round is such a common stone.

I am wondering how much the fluoresense makes in looks whiter!
 
James Allen is owned by a diamond supplier and that is why they can list more stones. And you are correct that they won't all the the same cut quality as the one at GOG. I would think GOG could call one in another one for you to look at by Friday if you ask them today, though.
 
Sarah actually said they just didn't have any to call in, I guess that range is very in demand! I feel like I need to seem more then one to compare, unless this is just the lucky stone!
 
Well, I mainly meant to compare color, and they can pull any size H stone for you to see next to it. Just do that and it will serve the same purpose. (I think smaller stones are just more plentiful, not that 2+ ct. stones are in more demand.)
 
Yes, Sarah just told me she has a nice 2.07 G VS2 for us to look at too! Which is great, so I can determine which qualities matter to me more! And she will pull other colors if she can, even if smaller stones.

And then I am looking at this stone, a 2.22 G VS2 pic and GIA below (if I attached correctly), with a different vendor but I won't be able to see in person.

2_22GVS2_Rd.jpg

2_22GVs2.jpg
 
Hi!

I am going to Good Old Gold tomorrow to see stones in person, and was just wondering about any advice, questions to really ask, what to look for, etc. I have been doing my reading but any tips would be so great!

Thank you
 
How very exciting! You've asked lots of good questions already. Tomorrow you need to focus on using your eyes to see what you love most!!! You aren't going to see stones there that aren't great, so you are safe! Have fun and tell Jonathan that diamondseeker said hello!! :wavey:

Good luck tomorrow and have a great time! :appl:
 
Thanks so much diamondseeker as always :)
 
Hi!

We had a wonderful visit to GOG! So very nice and helpful, and it REALLY helped for me to see different colors, cuts, clarities, etc. I definitely have settled getting a round brilliant. And although we saw a GORGEOUS 2.35 I SI1, I learned the I color was a bit to warm for me (I am used to having a E right now).

Anyways, Matt at GOG is bringing in others for us to see. Two options here:

http://www.goodoldgold.com/diamond/8952
http://www.goodoldgold.com/diamond/8955

Any pluses or minuses on either?

Thank you!
Amy
 
If you are fine with H color, that would be my pick. The G may not be eye/mind clean enough for your standards. Plus the H is cheaper!
 
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