Arrrggghh!!! Color came back lower on DC3000 Colorimeter than graded as on AGS cert...

[CarbonCrew]

Man I don''t know think. I''ve been super psyched about this diamond and ring buying experienced and now I''m a little bummed out. For those that have not been following my posts I purchased a .84 ct RB H&A SI1 J. Today I took it to get the setting and the put it on their own Sarin DC3000 colorimeter and it graded it at a K color. Should I be bummed or what? I kinda have mixed emotions at this point because I love the diamond, but I also don''t want to feel like I''ve been cheated

Any thoughts?

 

[strmrdr]

have it checked by a human, an independent human that isn''t trying too sell you something.
https://www.pricescope.com/appr_list.aspx

 

[swingirl]

It has an AGS rating of J. Who put it on their DC3000 Colorimeter? What does GOG recommend now? Can they send it back to AGS? Any adjustment on the price? A K might not mean a much lower price but I understand your disappointment.

Your stone is beautiful. But you have to be happy. There is a range for any color. Yours may have been on the border.

 

[Garry H (Cut Nut)]

I had a tour of the Lab couple of years ago. They have the very same machine sitting in one corner. I asked Peter about it and the answer was like "we use it, but it does not set the grade. It is part of the debate between graders when they encounter border line stones"

 

[DiamondExpert]

Could have been a very low J...remember each color grade is a range, not a point.

 

[CarbonCrew]

Do you all think that it is an issue worth pursuing or should I just drop this matter?

 

[diagem]

Date: 4/19/2008 1:01:19 AM
Author: CarbonCrew
Do you all think that it is an issue worth pursuing or should I just drop this matter?

AGS human graders set the grade for your Diamond..., machines dont set grades! (except for one Lab..., but...

)

 

[Gypsy]

If you love it and it looks great to you... and it's AGS Certed to a J... it's now a 'mind clean' issue. And we can't answer that for you. it sounds like your J was on the lower end of the spectrum and the machine rounded down, so to speak.

I'd go to an INDEPENANT appraiser, ask them to SEE their master color set, and decide for myself what color *I* think it is, if it were bugging me.

 

[Serg]

Date: 4/18/2008 11:09:55 PM
Author: Garry H (Cut Nut)
I had a tour of the Lab couple of years ago. They have the very same machine sitting in one corner. I asked Peter about it and the answer was like ''we use it, but it does not set the grade. It is part of the debate between graders when they encounter border line stones''

Garry, If machine can not do correct grade , it can not help in debate for BORDER line stones

 

[Garry H (Cut Nut)]

Date: 4/19/2008 3:22:58 AM
Author: Serg

Date: 4/18/2008 11:09:55 PM
Author: Garry H (Cut Nut)
I had a tour of the Lab couple of years ago. They have the very same machine sitting in one corner. I asked Peter about it and the answer was like ''we use it, but it does not set the grade. It is part of the debate between graders when they encounter border line stones''

Garry, If machine can not do correct grade , it can not help in debate for BORDER line stones

I think that is why it was in the corner

 

[Allison D.]

CarbonCrew, I think you answered your own question with this: "I love the diamond".

Keep it, enjoy it, and stop stressing.

Machines are great, but they aren''t a replacement for the human eye. Machines are wonderful for automating some things, but they are less optimal for subjective things.

Rest easy, too, knowing that you didn''t get cheated. You paid for an AGS-graded J, and that''s what you have. You have a stone that earned a J grade in the expert opinion of AGS graders. If you ever wanted to resell the stone, you can resell it exactly as that.....an AGS-graded J stone. That''s what it is.

Enjoy your diamond!

 

[Paul-Antwerp]

We use a GranDC for a number of years already next to human grading. In most cases, we found the machine rather reliable on rounds. In fancy shapes, the results depended highly on the cut-quality. If it was a poor cut, the colour-grade generally was way off. And stones with high fluorescence give an absolute unreliable result, sometimes D for a H-colour.

Just two months ago, we bought a new Gran, and again, results are consistent. But this machine always gives a result that is two colours lower than the actual colour. So a J will give L on this machine.

This shows again that one needs to build experience with a machine in order to fully interpret its results.

And you need not worry about a specific machine giving a lower grade than the report.

Live long,

 

[diagem]

Date: 4/19/2008 8:44:22 AM
Author: Paul-Antwerp
We use a GranDC for a number of years already next to human grading. In most cases, we found the machine rather reliable on rounds. In fancy shapes, the results depended highly on the cut-quality. If it was a poor cut, the colour-grade generally was way off. And stones with high fluorescence give an absolute unreliable result, sometimes D for a H-colour.

Just two months ago, we bought a new Gran, and again, results are consistent. But this machine always gives a result that is two colours lower than the actual colour. So a J will give L on this machine.

This shows again that one needs to build experience with a machine in order to fully interpret its results.

And you need not worry about a specific machine giving a lower grade than the report.

Live long,

Paul..., out of pure curiosity..., do you use or depend on a rough Diamond colorimeter when purchasing rough material?

 

[Paul-Antwerp]

Date: 4/19/2008 9:00:38 AM
Author: DiaGem
Paul..., out of pure curiosity..., do you use or depend on a rough Diamond colorimeter when purchasing rough material?

I could give you the short or the long answer. But I fear that the long answer gives away too much valuable information on our unique way of working.

The short answer therefore: NO. But we did test out a number of those machines, out of curiosity.

Live long,

 

[diagem]

Date: 4/19/2008 9:49:00 AM
Author: Paul-Antwerp

Date: 4/19/2008 9:00:38 AM
Author: DiaGem
Paul..., out of pure curiosity..., do you use or depend on a rough Diamond colorimeter when purchasing rough material?

I could give you the short or the long answer. But I fear that the long answer gives away too much valuable information on our unique way of working.

The short answer therefore: NO. But we did test out a number of those machines, out of curiosity.

Live long,

Thanks..., and I thought I was the only wacko

one (in this crazy cutters world) that is forcing myself away from purchasing one....

Good to hear..., thanks...