shape
carat
color
clarity

A diamond grading system which is more finely tuned than GIA

Cool, I hope this catches on.
This new systems makes a lot of sense to a buyer like me who appreciates precision.
It really separates and assigns grades to many distinct factors that GIA just lumps together into clarity or color.

This would take much of the mystery, risk, and fortunately the trust, out of finding the right diamond for you out of grades like today's SI1.

I can see today's more-desirable SI1s being more expensive than less-desirable SI1s.
This is how it should be.

Having to sort through one big bucket with all of today's SI1s is dumb.
I think they (and other grades) vary too much to be lumped together.
Having more things to assign a grade to will take more time though, and increase cost but I think it is justified.
Grading cost is a small percentage of diamond price but what the grades say has a HUGE impact on price.

This will be criticized by those jewelers who want you to learn nothing and just trust them, trust your eyes (regardless if those eyes have ever seen good cut), go with your heart, just buy the diamond that speaks to you, IOW turn off your brain, blah blah blah.
 
Very interesting.


I think its usefulness depends on where it's marketed. I would love one on my stone!


I don't think it's an appropriate way for a newbie to search for a diamond though, and I do think a lot of it is redundant if you have a knowledgeable vendor whom you trust. I can just imagine the slew of young men looking for T0 N0 S1 G0 None-open G+.... without taking the tine to read further and understand what it all really means.

-Your vendor can tell you if a stone is SI1+, SI1-, the inclusion pattern and concentration, and inclusions that break the surface
-The major labs grade polish/lustre already, and again a vendor can tell you if a stone is milky.
-There is a reason the major grades don't advertise colour as high-low-medium right now - it's already a human making the call, why increase the margins of error unnecessarily? To the average consumer an H is an H, and the more discerning consumer can ask his/her vendor. Does a colorimeter that can consistently and accurately detail to this precision exist on the market at the moment?
-The notation of what hue is causing the colour grade is awesome! I would love to be able to search for a "pinkish H" - but then, I imagine, so would everyone else so if this metric became widespread we'd see pinkish H's rise in price considerably
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-CUT. Thanks to putting "HA" on top now people will be even more likely to erroneously believe that the mere presence of hearts and arrows = better performance
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, unless they have a different definition that includes some performance-based determination like AGS.. How are they judging hearts - just how "modified" can they be?
 
Date: 6/1/2010 1:43:06 PM
Author: yssie


-CUT. Thanks to putting ''HA'' on top now people will be even more likely to erroniously believe that the mere presence of hearts and arrows = better performance
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, unless they have a different definition that includes some performance-based determination like AGS.. How are they judging hearts - just how ''modified'' can they be?

I couldn''t agree more, yssie, and the long I am a member of PS, the more I see this as an issue that needs to be discussed (and debated, of course!).
 
I think it would be much better for the layman consumer if they would just tell the cut grades like they really are

excellent = good
very good = acceptable
good = fair
fair = crap

Every grade is sugar coated now to make it sound like theres no bad diamonds. I joke a bit with my terms but they should switch to a number grade so it doesnt directly tell the consumer the cut is good when its not really good.

Hearts and arrows should not be a cut level but rather a symmetry declaration. That also implies that there will never be anything better than a hearts and arrows cut. In the future people may very well change to a different cut style which could be superior optics to the current designs.
 
Date: 6/1/2010 2:40:29 PM
Author: TakingthePlunge
I think it would be much better for the layman consumer if they would just tell the cut grades like they really are

excellent = good
very good = acceptable
good = fair
fair = crap

Every grade is sugar coated now to make it sound like theres no bad diamonds. I joke a bit with my terms but they should switch to a number grade so it doesnt directly tell the consumer the cut is good when its not really good.

Hearts and arrows should not be a cut level but rather a symmetry declaration. That also implies that there will never be anything better than a hearts and arrows cut. In the future people may very well change to a different cut style which could be superior optics to the current designs.
The issue is how they come to the conclusions of EX/VG/G - Some GIA VGs will have more optimal light return than some GIA EXs because of the proportion specifications. AGS does a much better job (with their dqd, I think the dqr just muddles their ideal grade!)

Totally agree with H&A being a symmetry declaration.
 
That is a good criticism of the H&A status. Who can best say what H&A actually means in an objective way? If we all used a system like this, there would still be lots of subjective grading "errors" and still plenty of do8ubt about the accuracy of grading. It might actually increase the doubt level since the more categories there are, the more room there is to be subjectively a grade apart.

What this system does reveal is the inner workings of how diamond dealers figure the relative value of identically graded diamonds which are materially diffreent than one another. This system helps to reveal those minute yet material differences that count when valuing an individual diamond. I believe this insight into the valuuation process is of interest to Pricescopers who always are asking about whether one diamond is better than another when they are both graded the same. It requires a very detailed study of each diamond to know how to really provide anything but a guess most times.
 
Garry has said good things about it.

It will be a very tough road to get any self-grading accepted at the consumer level in the US no matter how good it is at being right.
 
Re: "Symmetry"

The 3D cut precision assessment made using a reflective viewer needs a different descriptor. The word "symmetry" has long-standing ties to simple finish grading. Using it two ways promotes confusion. Lab symmetry grading and H&A assessments are not connected.
 
Re: VGS

As a professional I appreciate the detail. Taking clarity as an example, the devised system would provide significant information coupled with a plot. Is one provided? The Venus Grading Report on page 22 lists inclusions but I don't see a traditional clarity map. The pricing breakdown appears reasonable. Enforced with consistency I can see the draw of doing business with them as a supplier.

Re: The HA grade

Looking at page 17 it doesn't seem that HA is positioned above Ideal, since no price-difference exists. I interpret this as additional information only; the HA grade will be given if the diamond meets their Ideal proportions criteria and shows HA in their chosen viewing assessment (?) Someone with more familiarity may be able to confirm or deny that.
 
Date: 6/1/2010 4:09:33 PM
Author: John Pollard
Re: VGS


As a professional I appreciate the detail.
If I was sourcing diamonds for sale I would love these guys if the grades proved accurate but would still get gia/ags reports.
From what I understand helium dmc files are also available.
 
I am reading & it seems super detailed
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, but I wouldnt automatically translate it to a more overall efficient grading procedure.
I dont know Venus personally but hear great feedback on them as wide range suppliers to the trade.

Sure more detailed sounds great but here are some of my point of thought:

-500 master stones (and growing) sounds to me as bringing more confusion into the grading.
-multiple checking prior to setting a final grade sound even more confusing to me.
-Venus claims: "Each of the sub-grades....directly impact the pricing of a diamond which is not normally considered by other grading standards."
These sub-grades are considered by most professionals I know (which is an integral part of pricing).
Venus have their system..., others have other systems.

Its understandable that Venus (as manufacturers/dealers to a super wide variety of Diamonds..., kind of like a supermarket in our industry) will adapt a detailed marketing system to eficiently market their Diamonds (from low quality/rejection to cloudy or commercial to high end) to their clients doesnt make that specific system work on most other business models.
 
I explored a bit more and I''m having a lot of fun.

The Online Stock Search has an impressive range of functionality. It''s correlated with the VGS PDF overview from David''s original post. This means one can search using an impressive array of criteria... Color grade with + or - and shade / fluorescence and fluor color / luster as well as polish & symmetry / clarity grade and table orientation, blackness, openness and-or scatter pattern of inclusions. The proportions search includes the normal RB facets. I haven''t tried fancies-by-measurements yet.

Of special note is the Lab Search feature. A user can search according to overall AGSL, IGI or HRD cut grades. It also permits search by AGSL light performance deduction and/or proportions deductions separately. Since the diamonds I viewed are accompanied by VGRs or GIA Reports (also posted) I presume they are doing this via AGSL PGS license.

Most groundbreaking is the existence of a "Diamond DNA" page for each stone. The DNA page has dimensions/description, plotting image and computer-generated ASET image with AGS Parameter breakdown per PGS. For anyone wanting a data-overdose it also links to the diamond''s Sarin/Gem File, Stl File and Helium Report.

Impressive.
 
Date: 6/1/2010 5:55:59 PM
Author: DiaGem
I am reading & it seems super detailed
36.gif
, but I wouldnt automatically translate it to a more overall efficient grading procedure.
I dont know Venus personally but hear great feedback on them as wide range suppliers to the trade.

Sure more detailed sounds great but here are some of my point of thought:

-500 master stones (and growing) sounds to me as bringing more confusion into the grading.
-multiple checking prior to setting a final grade sound even more confusing to me.
-Venus claims: 'Each of the sub-grades....directly impact the pricing of a diamond which is not normally considered by other grading standards.'
These sub-grades are considered by most professionals I know (which is an integral part of pricing).
Venus have their system..., others have other systems.
Definitely. If I were your average commercial diamond flipper I imagine it would be a headache go through, not to mention a learning-curve for many, but it sure would be handy for those one-of clients who are dying for a diamond with fluorescence other than blue, or a somewhat visible inclusion, etc. Once one is familiar with their pricing structure it might be possible to better fit a client's budget by seeking known-discounts for XYZ - a low G, an open pavilion inclusion, a brutal girdle ;) - that the client has no objections to. I expect the effectiveness and impact will depend on the size of their inventory.

Some Pricescope retailers have been providing this kind of information to consumers for years with actual imagery all-around. I'm excited because Infinity has long been one of the world's only manufacturer/suppliers providing such detail...nice to see others doing it, and taking initiative in improving transparency.
 
Awesome. I already incorporate many of these features into our own grading to determine our signature diamonds. Opens, the type of particular grade it falls within etc. and provide the photomicrographs to demonstrate and take the cut grading to an even higher level. As John pointed out firms like Infinity, ourselves and others have been providing imagery that demonstrates some of the details of these reports but to be able to search for this on the fly is a valuable service for those of us who are seeking for clients with particular needs/wants (including our own). Recently we saw a diamond being advertised as H&A and it truly was an H&A but did not qualify for an open on the crown and upper half''s cut too steep.

I see how it could get confusing for a layman but it certainly does help differentiate values and explain why certain diamonds within a specific cut grade can have values that range by the thousands.

Today I was helping a client via email who wants to trade their 1.50ct F VS1 and all I had was a report. A cursory search on the PS database reveals values varying from as low as 13,800 to over 20k on a 1.50ct F VS1 and these are precisely the factors that can determine whether their diamond (or any given diamond) can come in at the lower or higher end of that spectrum. Many of these features, 99% of Internet vendors can not provide as a. most do not even see the diamond they are selling and b. even if they did do not have the lab equipment necessary to determine all of them.

Personally, I like it.
 
Hello All,

Again I may be biased here but I would like to note a few things about Venus and their system. I worked at the GIA for a long time and while I think the grading done there was very consistent there were certainly differences of opinion on many different stones over the course of a day. Here I am referring to both color and clarity. Given that environment I am unsure if more grades is the way to go. I would expect that this level of precision may be beyond the ability for humans to grade consistently.

Additionally I have had the occasion to look at a few hundred Venus graded diamonds, and in my opinion they are good graders, but certainly not at the level of a first-class grading laboratory. There seemed a great deal of variation in their grading and their rejection rate was similar to most other suppliers that my firm was working with.

I would add that I agree with Mr. Atlas that their addition of more factors is interesting and can be quite useful.
 
Food for thought, indeed. I think that there are several characteristics regarding diamonds that are not considered for most grading reports, including GIA''s. Having some of these generally-omitted characteristics evaluated and recorded (crystal, or hue as in the Venus report, for example) would be/is most helpful. However, I agree that too many components for evaluation may ultimately water down one''s ability to effectively comprehend it all, as well as add more room for human error and discrepancy (500 master stones makes my head hurt without even seeing them).

However, I do like the transparency aspect of this. And, it does help the layperson to better understand pricing. Also, I can see myself getting all fuzzed-up (in a good way) about detailed reports like this. It''s because of my "I just can''t get enough of diamonds" disease...

I am curious though: as grading reports and methods of evaluation become more precise, lab-oriented and technical, how do professionals feel in terms of how these changes affect their positions/traditional roles in the business? Does this stuff make an impact or matter at all? Is the "technicalization" of diamond grading, reporting and marketing threatening to some people in the business? Should it be? Is anyone worried that we layfolks won''t need our "diamond guy with the good eye" anymore?

I can say, that for me, after all is said and done (and written), if I''m not able to see a stone in person, I still want my "trusted professional" to get an eyes-on look and tell me what he thinks. I''d feel that way even with a super-techno-hyper-extensive-highly respected report. That''s because for me, in the end, there is no substitute for a diamond''s unique, individual appeal (or non-appeal) and the human eye is most qualified to really judge the overall appeal and beauty of any given stone.

I know... I''m a nerd.
 
Date: 6/1/2010 9:19:43 PM
Author: Tom Gelb
Hello All,

Again I may be biased here but I would like to note a few things about Venus and their system. I worked at the GIA for a long time and while I think the grading done there was very consistent there were certainly differences of opinion on many different stones over the course of a day. Here I am referring to both color and clarity. Given that environment I am unsure if more grades is the way to go. I would expect that this level of precision may be beyond the ability for humans to grade consistently.
Since many of the diamonds in their search come with a grading report already I wonder if the thread's title needs clarification? Is the intent to provide their own robust information in addition to diamonds with existing reports - or to become a major grading laboratory? Their searchable inventory currently has around 1500 RBs and 1800 other shapes 0.50-3.00 ct. Depending on turnover and manpower this certainly seems manageable in terms of consistency, standards and repeatability. An attempt to implement it on a global scale would indeed be challenging.

Your experience speaks to this. GIA does a great job for a huge lab, taking in around 40,000 diamonds per week for grading in Carlsbad, NY and India. The different locations, hundreds of workers and subjective nature of the systems make it reasonable to expect some variability. If we project 90% consistency that's still 4000 stones per week that could be perceived somewhere as incorrect - and that is with the system as-is.

Additionally I have had the occasion to look at a few hundred Venus graded diamonds, and in my opinion they are good graders, but certainly not at the level of a first-class grading laboratory. There seemed a great deal of variation in their grading and their rejection rate was similar to most other suppliers that my firm was working with.
My impression on variation would be the opposite when it comes to measurements. With full 3D scans on Helium and the option to sort by several labs' systems, including PGS, it seems like they're hiding nothing and providing consistent info. Of course human graders are required to assess finish (and luster). In any case, a system designed to narrow color and clarity to smaller ranges than the trade employs now had better make consistency a high priority!
 
Date: 6/1/2010 10:22:57 PM
Author: Rockit
Food for thought, indeed. I think that there are several characteristics regarding diamonds that are not considered for most grading reports, including GIA''s. Having some of these generally-omitted characteristics evaluated and recorded (crystal, or hue as in the Venus report, for example) would be/is most helpful. However, I agree that too many components for evaluation may ultimately water down one''s ability to effectively comprehend it all, as well as add more room for human error and discrepancy (500 master stones makes my head hurt without even seeing them).

However, I do like the transparency aspect of this. And, it does help the layperson to better understand pricing. Also, I can see myself getting all fuzzed-up (in a good way) about detailed reports like this. It''s because of my ''I just can''t get enough of diamonds'' disease...

I am curious though: as grading reports and methods of evaluation become more precise, lab-oriented and technical, how do professionals feel in terms of how these changes affect their positions/traditional roles in the business? Does this stuff make an impact or matter at all? Is the ''technicalization'' of diamond grading, reporting and marketing threatening to some people in the business? Should it be? Is anyone worried that we layfolks won''t need our ''diamond guy with the good eye'' anymore?

I can say, that for me, after all is said and done (and written), if I''m not able to see a stone in person, I still want my ''trusted professional'' to get an eyes-on look and tell me what he thinks. I''d feel that way even with a super-techno-hyper-extensive-highly respected report. That''s because for me, in the end, there is no substitute for a diamond''s unique, individual appeal (or non-appeal) and the human eye is most qualified to really judge the overall appeal and beauty of any given stone.

I know... I''m a nerd.
Hi Rockit,

Most of this has nothing to do with the taste or appeal of a given diamond or even the "trusted eye" of a jeweler. This deals with issues of structural integrity, nature, type and location of inclusions, color hues and other real gemological issues that impact value even the best "eyes" can''t see on a practical level. Value by up to thousands of dollars. I admit 500 master stones it quite wild but I''d actually like to see them and the standards they use for each grade. I have certain masters I use as well when we are giving an instore presentation to demonstrate different cutting features but nowhere near 500. I don''t think any lab has that much.

All the best,
 
How ya doin John? Good to see you. You in Vegas?
 
Thanks Rhino. Goodness, I'm sorry that my post reads like that of a simpleton... really, I do understand the impact of improved technologies upon "real gemological issues." I'm not sure where one draws a line between "real" issues and issues of interest for lowly consumers, however, I get it, really. Especially the impact upon value. That is precisely why I asked the question regarding vendors, and why I said that in basic terms, all this has EVERYTHING to do with the "trusted eye" of a jeweler or other gem pro. After all, historically, it has been new ways of "seeing" gems that ultimately enable us to understand and put a value upon them for what they "really" are. Take ruby and spinel, for example.

Let's not forget basic economics – pricing is all about perceived value, especially in diamonds. You can haggle amongst yourselves about diamond values all you like. In the end, you need to figure out when you've had enough, or when more (information) is too much to be of positive use to you... perhaps, there will be no limit for your quest for detail.

And, I should have been more clear, my comments concern gems that are to be used for jewelry (as opposed to collector stones). For me, that puts a priority on "visual appeal." You can price the stone any which way you like, based upon whatever criteria you deem necessary. Ultimately, buyers decide whether a particular stone is worth the price.

Advances in technology impact both the way we see and price gems, as well as they way in which consumers use professionals like you. Just look at the impact grading and lab report and internet-based vendors have had on B&M vendors. I contend that there is a big pile of consumers who believe that a report – detailed or not, from GIA, Venus or Bob's Lab – is all they need to ensure they are purchasing a "great" diamond. I contend that there is STILL more to it than that.

I too would like to see the 500 stones. Actually, I'd like to work with the stones in the lab for a few months (or until my eyes fall out of their sockets, whichever comes first). One doesn't have to be an industry insider to have knowledge and interest... even expertise, in such matters. Carry on.
 
Date: 6/2/2010 8:11:16 AM
Author: Rockit
Thanks Rhino. Goodness, I'm sorry that my post reads like that of a simpleton... really, I do understand the impact of improved technologies upon 'real gemological issues.' I'm not sure where one draws a line between 'real' issues and issues of interest for lowly consumers, however, I get it, really. Especially the impact upon value. That is precisely why I asked the question regarding vendors, and why I said that in basic terms, all this has EVERYTHING to do with the 'trusted eye' of a jeweler or other gem pro. After all, historically, it has been new ways of 'seeing' gems that ultimately enable us to understand and put a value upon them for what they 'really' are. Take ruby and spinel, for example.
I doubt anyone had that impression. You raise questions from an important perspective.

I would reiterate that this is intended as B2B, not B2C. Any pro who has invested the time, dialogue and shipping expense necessary to build a file of reliable vs unreliable supplier-reps can appreciate the intent... Hello, nice to meet you. Is it a clean SI1? "Oh yeah." How clean? "Very." The inclusions didn't show up on the fax you sent, what color is the crystal and where is it? "White under-kite." What about the cloud? "Non-issue, you can't see it." Ok, I'd like to bring it in ...Now hold your breath unless you've done business with them before and can interpret what they describe vs what is delivered.

Let's not forget basic economics – pricing is all about perceived value, especially in diamonds. You can haggle amongst yourselves about diamond values all you like. In the end, you need to figure out when you've had enough, or when more (information) is too much to be of positive use to you... perhaps, there will be no limit for your quest for detail.
There's no limit for pros. But personally (and I may find myself stoned in the Pricescope town square for daring to suggest it) I think there's already too much learning curve for Joe Normal. I might feel differently if the existing system was consistently applied, but it's not. Put yourself in the shoes of a young Marine who wants to propose while on a brief leave: He learns that VS2 is 'supposed to be clean' but sees salt & pepper in the mall. And how can SI2 be clean sometimes but SI1 might not be? And why is there tint in this H but no color in the I over there? And this doesn't even begin to touch-on cut.

It seems ludicrous that the trade accepts things as they are. "We" receive deep-discounts for diamonds graded with inconsistent/softer standards, yet "we" pass them on as if they were great deals rather than off-graded myths.
38.gif
I use "we" in a big-picture sense - many disclose to their clients that standards differ - but I think "we" need to harmonize what exists before introducing a system with greater complexity to Joe Normal.
 
Date: 6/2/2010 2:30:15 AM
Author: Rhino

How ya doin John? Good to see you. You in Vegas?
Arriving this afternoon. See you on the floor?
 
Date: 6/2/2010 10:19:33 AM
Author: John Pollard

Date: 6/2/2010 8:11:16 AM
Author: Rockit
Thanks Rhino. Goodness, I''m sorry that my post reads like that of a simpleton... really, I do understand the impact of improved technologies upon ''real gemological issues.'' I''m not sure where one draws a line between ''real'' issues and issues of interest for lowly consumers, however, I get it, really. Especially the impact upon value. That is precisely why I asked the question regarding vendors, and why I said that in basic terms, all this has EVERYTHING to do with the ''trusted eye'' of a jeweler or other gem pro. After all, historically, it has been new ways of ''seeing'' gems that ultimately enable us to understand and put a value upon them for what they ''really'' are. Take ruby and spinel, for example.
I doubt anyone had that impression. You raise questions from an important perspective.

I would reiterate that this is intended as B2B, not B2C. Any pro who has invested the time, dialogue and shipping expense necessary to build a file of reliable vs unreliable supplier-reps can appreciate the intent... Hello, nice to meet you. Is it a clean SI1? ''Oh yeah.'' How clean? ''Very.'' The inclusions didn''t show up on the fax you sent, what color is the crystal and where is it? ''White under-kite.'' What about the cloud? ''Non-issue, you can''t see it.'' Ok, I''d like to bring it in ...Now hold your breath unless you''ve done business with them before and can interpret what they describe vs what is delivered.



Let''s not forget basic economics – pricing is all about perceived value, especially in diamonds. You can haggle amongst yourselves about diamond values all you like. In the end, you need to figure out when you''ve had enough, or when more (information) is too much to be of positive use to you... perhaps, there will be no limit for your quest for detail.
There''s no limit for pros. But personally (and I may find myself stoned in the Pricescope town square for daring to suggest it) I think there''s already too much learning curve for Joe Normal. I might feel differently if the existing system was consistently applied, but it''s not. Put yourself in the shoes of a young Marine who wants to propose while on a brief leave: He learns that VS2 is ''supposed to be clean'' but sees salt & pepper in the mall. And how can SI2 be clean sometimes but SI1 might not be? And why is there tint in this H but no color in the I over there? And this doesn''t even begin to touch-on cut.

It seems ludicrous that the trade accepts things as they are. ''We'' receive deep-discounts for diamonds graded with inconsistent/softer standards, yet ''we'' pass them on as if they were great deals rather than off-graded myths.
38.gif
I use ''we'' in a big-picture sense - many disclose to their clients that standards differ - but I think ''we'' need to harmonize what exists before introducing a system with greater complexity to Joe Normal.
Totally agree with this.
Before introducing a new system, there needs to be consistency within the "standards" that do exist.
 
Venus is a major supplier to the trade and uses this system only on their own diamonds. They are not offering lab services to anyone else. They have shown a lot of dedication in perfecting this finely graded system which they use to help their customers obtain more pres\cisely the kind and type of diamond they actually need at the most competitive level of pricing. Such a system would not be welcomed readily by the public or the major labs. Dealers would probably not like it either as it further erodes their blind buying edge.

Still, I thought it would be of interest to the Pricescopers who better understand the missing elements in current trade reports.
 
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