Like other fancy shape diamonds, there are certain criteria you need to keep in mind when selecting an Asscher. Being step cuts, Asschers have reduced brilliance and scintillation compared to the round diamonds. As a result, material flaws and inclusions don’t get hidden up so easily.

If you want a diamond that faces up white, choose stones with a G color grade or better. Also, I recommend selecting diamonds with a minimum clarity grade of SI1 or better. Do take note that larger diamonds above 2 carat sizes might even require a VS1 clarity to stay eye clean. That said, it is compulsory to visually inspect diamonds for eye cleanliness before carrying out a purchase.

Check Out These 2 Great Looking Asschers

Don’t you just love it when they give you a hypnotic feeling?


nice looking asscher cut diamond

1.05 Carat F -SI1 Ideal Cut Asscher

ideal asscher cut diamond

1.93 Carat F-VS1 Ideal Cut Asscher


Interested in diamonds like this? Click here to browse with high resolution videos…

Don’t Forget to Check The Windmills!

Here’s a major tip most jewelers are clueless about. Well, even if they do have some knowledge of this, they might not share it with you (for obvious reasons!). In Asscher cuts, the “windmills” in the diamond should extend all the way into the middle of the stone and converge into a single point. This will create a balanced and pleasing outlook that also helps in the stone’s light performance.

asscher windmill effect that isn't ideal

The “windmills” terminate before they reach the middle…

In my personal opinion, if the “windmills” join up before reaching the center, they are telltale signs of a poorly proportioned diamond. Having performed a number of physical comparisons of such diamonds, I can tell you these diamonds usually lack a “hall of mirrors” effect which gives the Asscher its characteristic flavor.

When I am personally searching for an Asscher, this factor is an automatic dis-qualifier that will cause me to reject the diamond.

Best Proportions For An Asscher Cut Diamond

There are also two primary characteristics you want to pay attention to when looking at proportions. These are depth percentage and table size which are both expressed as percentages in a grading report. Try to look for stones with a depth between 60% and 65% and a table size between 59% and 65%.

Excellent Very Good Good Fair/Poor
Table % 59% – 65% 58% – 68% 56% – 70% Outside Ranges
Depth % 60% – 65% 58% – 67% 57% – 69% Outside Ranges
Polish/Symmetry Excellent – Very Good Good Outside Ranges
Length to Width 1.00 – 1.05 1.05 – 1.10 1.10 – 1.15 Outside Ranges
Girdle Thickness V. Thin – Slightly Thick V. Thin – Thick Outside Ranges
Culet Size None Very Small Small Outside Ranges

* Note: The parameters in this table should be used as a reference only. It is best to use videos to view the diamond in motion or see the stone physically to determine its scintillation pattern. The use of an ASET scope will also aid greatly in determining the optical characteristics of the diamond.

James Allen’s impressive video technology allows you to cherry pick a great looking Asscher cut diamond from hundreds of available options. Click here to start browsing now!

asscher cut diamonds length to width ratio

Ideally speaking, you should only consider Asschers with length-to-width ratios between 1.00 – 1.05 : 1. Anything larger than that, the diamond will appear off-square and look awkward. Next, I will show you the exact step-by-step process you can use to buy a well-cut Asscher cut diamond…

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  1. Avatar
    January 26, 2015 at 12:49 pm

    I do not understand the portions about having ‘windmills’ in the Asscher-cut diamond. How do we create it and how do we remove it from diamond?

  2. Avatar
    Paul Gian-
    February 4, 2015 at 3:47 am

    If I understand you correctly, the question you are asking pertains to diamond cutting. This is beyond the scope of our website itself since we are focused on helping consumers buy diamonds and not so much on addressing technicalities for professionals in the trade. You can probably find more information at the following links:

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