NOTE: Very often, grading reports for diamonds with carat weights less than 1.00 do not show a reference plot for its inclusions. Instead, the clarity features of the diamond are indicated under the “comments section” with a couple of words. That’s a big problem because it is impossible to judge a diamond’s appearance accurately based a few descriptive words.

If you are considering buying diamonds based on a certificate, you are taking a huge risk with “blind shopping”. For people with the budget to purchase stones with top clarity grades like IF, VVS1 or VVS2, you probably don’t have to worry about clarity issues.

What about consumers who intend to value shop and go lower in clarity requirements? How would you be able to select diamonds within the VS2-SI1-SI2 clarity range when you don’t know if the inclusions would impact the diamond’s overall appearance?

Here’s how…

If you are buying an engagement ring in a physical brick and mortar store, request to see the diamond under a loupe or a microscope. You should get the jeweler to show you where the diamond’s inclusions are and check to see if they are eye-visible without any magnification aids.

If you are shopping online, you MUST ALWAYS request a photograph or a video of the diamond. This will not only help you determine whether the stone is eyeclean, it will also help reveal other aspects of cut quality.

Never Buy Blind! You Are Only Playing With Luck.

As an illustration, let me show you 2 GIA grading reports for diamonds with the same color, clarity and cut grades. Feel free to download the reports and verify them yourself by clicking the links below.

0.73 Carat G-SI2 Excellent Cut Round Diamond – GIA Report Number #2141474872
0.73 Carat G-SI2 Excellent Cut Round Diamond – GIA Report Number #2135963357

gia diamond dossier report

Based on the GIA certificates alone, these 2 diamonds appear identical to each other. This happens to be a huge pitfall for unwary consumers who don’t understand how things work. They will be in for a RUDE SHOCK if they bought the 2nd diamond.

 
g colour excellent cut eye clean SI 2 clarity

Diamond with GIA #2141474872

g colour round excellent not eye clean si 2

Diamond with GIA #2135963357

 

Having seen photographs of these two diamonds, which one would you choose now? I guess it is pretty obvious which diamond is hands-down the better choice!

These Aren’t Isolated Cases. I Can Show You Even More Examples…

Even if you are looking at a full grading report with an inclusion plot, there are details that aren’t revealed without closer inspections. Sometimes, harmless looking plots can actually turn out to have unsightly inclusions!

opaque crystal

Crystals can exist in different colors depending on the type of embedded mineral. In this particular example, the crystal takes on an awful opaque appearance.

intensity of cloud particles

In this example, the crystal inclusions at the center of the diamond aren’t visible to the naked eye since they are transparent. However, the real concern is the cloud located at the 5 o’clock position.

As you can see, the lab report only shows you the type and location of inclusions in a diamond. In the grading report, there is no indication about the intensity of cloud particles or the coloration an inclusion has.

A Grading Report by Itself Isn’t Sufficient!

Did you know that most online stores (e.g. Bluenile.com) WILL NOT provide any further details (like photographs or videos) beyond a grading certificate? Seriously, there’s no way you can make rational buying decisions with such limited information. If reading this article doesn’t change your mind about buying blind, my advice is to stick with a minimum clarity of VS1 or better.

For other smart shoppers, you probably know that seeing REAL photographs or videos in a big ticket purchase is a must. I recommend that you check out sites like James Allen or Brian Gavin where they get things done right and even provide free gemological examination services on your behalf.

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10 Comments

  1. maes-
    March 3, 2016 at 5:48 pm

    very instructive. the lesson is: inspect it yourself and keep a lookout for diverse impurities.

    thank you

  2. April 4, 2016 at 4:03 pm

    Hello! I’m trying to purchase a diamond and find it to be extremely confusing! My budget is no more than 8000 for the diamond. I going to have a custom setting made using other diamonds from my original engagement ring. I want a good diamond that I can pass down to my daughter.

    What do you think about this one? It’s over my budget but I haven’t found another that seemed to be of good quality.

    Thank you for your help!

  3. Paul Gian-
    April 5, 2016 at 9:24 am
  4. philly-
    June 10, 2016 at 2:26 am

    Looking for a 1.27-1.4, F-H, X3, no-faint fluorescence, table 54.4-57.5%, depth 56.9-63.9%, for < $7400. Do you have any recommendations? I found a bunch on JamesAllen but wasn't sure if the characteristics were going to be eye clean (gemologist thought this one might be despite the wisps: https://www.jamesallen.com/loose-diamonds/round-cut/1.33-carat-h-color-si2-clarity-excellent-cut-sku-937066 )

  5. Paul Gian-
    June 13, 2016 at 2:22 am

    The diamond’s eyeclean but there’s 2 issues I have with it:

    1) The stone might be slightly hazy due to the immense amount of twinning wisps in it.
    2) The crown angles are too high.

  6. David Mackay-
    June 17, 2016 at 6:36 am

    Hello. I am looking for stud earrings for an anniversary present and I have landed on these two stones after a pretty exhaustive search. I will see them in person tomorrow at a wholesaler:

    GIA #15379074 and GIA #5213644718

    What do you think? And what would be a fair price, unmounted?

    Thank you for your time!
    David

  7. Karen Smith-
    June 17, 2016 at 11:35 am

    Hi Paul, I have been looking on the James Allen site as trying to source a 3ct Pear shape d-f around $45k -$50k. For value I am looking at VS2/SI1 but with excellent symmetry and polish. Where I am struggling with knowledge are the inclusions and the spread although I did read your last article which was very useful.
    Any help would be appreciated.

  8. Paul Gian-
    June 17, 2016 at 3:03 pm

    You probably want to email me directly.

  9. evelyn-
    August 4, 2016 at 12:43 am

    Hi Paul,
    I found your instructions very helpful and gives me the reassurance to buy from online retailers like James Allen. May i ask you to comment on the clarity of this stone that I am now still considering.
    Are there any cloudy inclusions or any red flags that you might detect which an untrained eye such as mine would have missed?

    https://www.jamesallen.com/loose-diamonds/emerald-cut/2.33-carat-h-color-vvs1-clarity-sku-896845

  10. Paul Gian-
    August 4, 2016 at 6:08 am

    Inclusions will never be an issue in a VVS1 diamond graded by GIA.

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