Follow Us!

Search Truth about Diamonds


Click to Watch Us on Anderson Cooper

May
15

Cushion Cut Diamonds – Cushion Cut Engagement Rings

Posted by: | Comments (155)

Standard Cushion Brilliant Plots

If you’re out there looking for the best diamond for your money, then please contact me and let me know your budget and what you’re looking for. I’ll sift through thousands of diamonds online and send you a list of 4 or 5 suggested stones to choose from that fit your needs the best.  Unlike the other sites, I’m not looking to sell you anything – my advice is objective and in your best interest.  The service is free, and there is absolutely no commitment to buy any of my suggestions.  You have nothing to lose!

Buying a Cushion Cut Diamond Ring?

Bottom Line Recommendation:

  • Color: H Color or better. Cushion cuts are one of the worst shapes when it comes to retaining color (or one of the best, if you’re a manufacturer of fancy color diamonds).  This is why you find that Cushions and Radiants are the two most common shapes in the fancy color diamond market.  For this reason, I recommend my readers stick with H or better when buying a cushion cut, unless it will be set in yellow gold (in which case, you can go down to J or K)
  • Clarity: Stick to SI2 clarity or SI1 clarity for the best value.  Since cushion cuts have a large open table, it might be difficult to find a nice eye clean SI2.  So you might have to compromise and end up paying a bit extra for a higher clarity stone. Don’t trust a site listing virtual inventory at their word regarding checks for eye-cleanliness (see my Blue Nile Review for why that is). Inspect the photos and only trust a vendor’s eye cleanliness check if they’re checking it themselves (as does James Allen).
  • Cut Parameters for Cushion Cut Diamonds:
    • Depth: Under 70%
    • Table: Under 70%
    • Polish/Symmetry: Good, Very Good, or Excellent
    • Length/Width Ratio: Whatever you like!
    • As you can see, these parameters are very loose.  It’s important to remember that with Cushion cuts (as is the case with many other soft-sided fancy shapes), you can’t really evaluate a stone’s cut quality by its numbers alone.  You need to see the stone and see with your own eyes how it looks.

The Cushion Cut – As Popular as it is Misunderstood

After Rounds and Princess Cuts, the shape I hear about most lately is the Cushion Cut.  I think there are two primary reasons why this is so.  Firstly, and most obviously, Cushion cuts are simply more popular now than they have ever been before.  But almost as important is the fact that Cushion cuts are simply a very confusing cut.  There are a whole host of terms specific to cushion cuts that need understanding.  Terms such as modified cushions, classic cushions, chunky cushions, broken glass, crushed ice, no culets, large culets, old minders, square cushions, and rectangular cushions.

Cushion Modified Brilliant Facet Plots

Standard vs. Modified Cushion Brilliants

GIA Certificate of Modified Cushion (Click to Enlarge)

GIA Certificate of Standard Cushion (Click to Enlarge)

Modern Cushion cuts can be classified into one of two main categories: standard or modified.  You can view the differences between the two in the two collections of plot diagrams shown on this page. Above, you can see the collection of standard cushion cut facet plots and to the right, the collection of modified cushion cut facet plots.  Likewise, I have posted to the right and to the left sample GIA certificates correlating to the two cushion cut styles.

As you can see, the differences between Standard and Modified Cushions are rather minute and technical in nature.  Their effect on a stone’s appearance is likewise fairly minimal.  The only thing that really differentiates between the two is history.  The Standard Cushions are the cutting styles that have been around longer while the Modified Cushions are simply modern variations on the original cushion cut facet patterns.

The single greatest mistake people make regarding cushion cuts is that it actually makes a significant difference to the stone’s appearance whether it’s a standard cushion or a modified cushion.  In fact, if you’ve reached this page after doing research elsewhere, I’m sure you’ve already heard that line several times before.  People will tell you that you need to buy a standard cushion if you want a “chunky cushion” (see below) and you need to buy a modified cushion if you want a “crushed ice” cushion (also below).  This is completely inaccurate.  The truth about cushion cuts is that it rarely makes any kind of noticeable difference in a cushion cut’s appearance whether it’s standard or modified.

“Chunky” vs. “Crushed-Ice” Cushion Brilliants

Antique / Chunky Cushion Cut Look (Click to View Stone's Page)

Just as there are two distinct categories of cut classifications of cushions, so too are there two distinct categories of “looks” that a cushion cut diamond can display.  Before we discuss these two categories, however, it’s worth stressing again that there is absolutely no correlation between the two groups of cut configurations and the two types of exhibited “looks.”

Broken Glass / Crushed Ice Cushion Cut Look (Click to View Stone's Page)

“Chunky” cushions are those that have clearly defined facet patterns when looking down into the table of a face-up oriented stone.  These tend to resemble the way in which round diamonds present themselves.  These are often called “antique” cushion cuts.  This is actually technically not true since the cushion brilliant cut is relatively modern.  The Old Miner is the antique antecedent to the modern cushion cut.  Although, it’s clear this look is referred to as an “antique” cushion because this is how Old Miner cuts always present themselves.

“Crushed-Ice” cushions are those that have no discernable faceting when you look through their table.  All you can see is what looks like broken glass or crushed-ice (hence the name) – a disorganized space of sparkling bling.  This is typically what a radiant cut looks like.  You also find this effect in corners of pear shapes and marquise shape stones.

Pure Crushed Ice Look of a Radiant (Click to View Stone's Page)

Clean Symmetrical Lines of a Round (Click to View Stone's Page)

If you’d like to see the difference between these two looks – the easiest way to understand it is by looking at the two shapes that most exemplify each “look”: Radiants for “Crushed Ice” and Rounds for the clean cut look of the “chunky” cushions.  To the left is a typically crushed ice radiant.  Notice in the picture of the round stone to the right how clearly defined and symmetrical each of the facets are and how different that is from the Radiant to the left.

Now just to drive the point home, I didn’t choose those two pictures of cushion cuts above at random.  It happens to be that the “antique/chunky” cushion in the picture above and to the left is a GIA certified Cushion Modified Brilliant.  It also happens to be that the “crushed-ice” cushion in the picture above and to the right is a standard “Cushion Brilliant.”  Feel free to click on each picture to be brought the each stone’s page on James Allen.  You can view each stone’s certificate there as well.

Buying the Best Diamond for a Cushion Cut Engagement Ring

Now that you’re more familiar with the basics of the cushion cut, lets deal with the details of the four Cs.

Color

When it comes to the diamond color of a cushion cut, one needs to be very careful.  Cushions and radiants retain their color stronger than any other shape. These shapes are on the opposite end of the spectrum from rounds, which are the best at masking their color.  This, by the way, is the reason why the fancy color diamond market is loaded with cushions and radiants and why round fancy color diamonds are extremely rare.  Because of this, I recommend people looking to buy cushion cuts who plan on setting them in white gold or platinum stick to H color or higher.

Clarity

Regarding Diamond Clarity, a cushion cut can be a bit tricky.  Firstly, it’s important to note whether you’re looking to buy a crushed-ice cushion or an “antique” cushion.  The reason is simply that the crushed-ice look, in any shape diamond, is generally a very good hider of inclusions.  This is why, if you’re looking to buy a marquise or pear shape diamond, it’s always best if the inclusions are in the corners as they’ll be very heavily masked by the crushed-ice that’s typically found in the corners of these shapes.  Of course, you’ll only know what kind of cushion look you’ll be buying if you can see a picture of the diamond in question – so it’s already a given that you’d be able to inspect the diamond’s clarity as well.  Therefore, like always, shoot for the lowest clarity you can find that’s still eye clean.

Cut Quality

As with the other soft-sided fancy shapes, there aren’t any real hard and fast rules when it comes to the stone’s parameters.  Nothing on a certificate will tell you whether or not the stone is an “antique” style cushion or a “crushed-ice” style cushion.  Nothing on the certificate will tell you how rounded the corners are: some cushions are nearly round, and some are nearly square.  Therefore, if you are looking to buy a cushion cut diamond it is imperative that you limit yourself to vendors who offer clear magnified pictures of their inventory.  If you try and buy a cushion cut blindly, with only a certificate to go by, it’ll be like picking candies out of a box of chocolates – “you never know what you’re gonna get!”

Just a very general guideline, try to stick to cushions with a depth under 70% and a table under 70%.  People will tell you that lower is better, but I’ve seen plenty of very beautiful cushion cuts with depths at 70% and tables at 70%.  People will also tell you to avoid “extremely thick” girdles, but on cushions, this is much less of an issue. Cushion cut girdles are almost always chunky, so there isn’t much you can do about it.  Obviously, if you have two seemingly equivalent stones, and one has a medium girdle, and the other has an extremely thick girdle, you should buy the one with the medium girdle.  But this rarely happens.  You should first look to find a nice looking cushion that is an H color or higher with as low of a clarity grade as possible that’s still eye clean in as large of a diamond as possible that fits your budget.  Only after you accomplish that should you focus on girdle thickness.

If you have any questions, please post them in the comments below.  I will usually respond within 24 hours.

Related posts:

  1. Q&A: Looking for Round, Cushion, or Oval-Shaped Diamond for $2K Budget
  2. Q&A: Assistance Buying a Square Cushion Cut Diamond
  3. Best Cushion Cut Diamond for $12000: 2.05 Carat I Color VS2 Clarity Ideal Cut GIA Certified Cushion Cut Diamond
  4. Q&A: Best Cushion or Radiant Diamond for $8K Budget
  5. Best Cushion Cut Diamond for $5000: 1.21 Carats, G Color, SI2 Clarity Ideal Cut, GIA Certified Cushion Cut Diamond

Comments

  1. Kyle says:
    January 31, 2012 at 10:46 pm

    Hi Ira,

    I am looking for a combination of the biggest stone and best quality I can get for around $6000-6500. This is a diamond that I am seriously considering. http://www.jamesallen.com/diamonds/I-VVS2-Good-Cut-Cushion-Diamond-1442020.asp
    I am planning to set it in White Gold, likely this setting:
    http://www.jamesallen.com/engagement-rings/pave/18k-White-Gold-Thin-French-Cut-Engagement-Ring.html
    I know you mentioned to keep it at an H color or better, would you recommend this stone or another?

    Another stone I am considering, but it is a different cut, is: http://www.jamesallen.com/diamonds/I-VS2-Ideal-Cut-Emerald-Diamond-1355202.asp
    I do see a small inclusion on the picture. Is this eye clean?

    Reply
    • Mike says:
      February 1, 2012 at 12:13 am

      Hi Kyle I would not recommend an I color cushion cut. Plus, that stone is very shallow which means it probably will not be as brilliant as it should be. The emerald cut you linked to is a very nice stone, however.

      Reply
  2. Shaun says:
    January 31, 2012 at 3:25 am

    Hi Mike and Ira,

    Could you please have a look at this diamond and let me know if its a good buy? I couldnt see any inclusions but I don’t have a trained eye. The diamond will be set in a platinum halo pave setting.

    Thanks for the help.

    http://www.jamesallen.com/diamonds/G-SI1-Premium-Cut-Cushion-Diamond-1123376.asp

    Reply
  3. steve says:
    January 29, 2012 at 4:44 pm

    Hi, I need help trying to decide between these two diamonds. It is going into a halo setting and want to make sure the diamond is eye clean.

    http://www.jamesallen.com/diamonds/E-SI2-Ideal-Cut-Cushion-Diamond-1280463.asp
    http://www.jamesallen.com/diamonds/F-SI2-Ideal-Cut-Cushion-Diamond-1439156.asp

    Thanks

    Reply
  4. Tom says:
    January 27, 2012 at 10:59 am

    Hi, I was wondering if you could help me out by giving some indication as to what type of inclusion would be visible to the naked eye. For example, on the two stones below, the cushion has lots of tiny inclusions and the princess has larger but fewer inclusions.

    http://www.jamesallen.com/diamonds/I-SI1-Ideal-Cut-Cushion-Diamond-1439288.asp
    http://www.jamesallen.com/diamonds/H-SI2-Ideal-Cut-Princess-Diamond-1439886.asp

    Obviously the loupe tool makes it easy to see them but so I can use that tool effectively could you please give me your opinion as to what would be seen by the naked eye when the stone is in a ring.

    Please ignore color, cut etc I am just using these stones as examples of the different inclusions.

    Thanks in advance

    Reply
  5. Ted says:
    January 26, 2012 at 3:26 am

    Hi,

    I’m looking at purchasing a 2.51 CT cushion cut diamond. I have some concerns about purchasing an EGL USA graded and the below diamond specifications. Do you think that G SI1 is acceptable for this type of stone. I also do not understand with the cushion square modified brilliant means. The measurement also seem a bit small for this size carat weight? Can you please provide some feedback on this stone? Thanks

    Weight 2.51 CT
    Shape CUSHION SQ. MODIFIED BRILLIANT10
    Color G
    Clarity SI1
    Measurements 7.75 x 7.49 x 5.24 mm
    Depth 70%
    Table 61.9%
    Crown 14.2%
    Pavilion 53.3%
    Crown Angle 37°
    Pavilion Angle 38.6°
    Girdle THIN TO SL. THICK FACETED
    Polish VERY GOOD
    Symmetry VERY GOOD
    Fluorescence N/A
    Culet N/A
    Cut Grade N/A

    Reply
  6. Monique Johnson says:
    January 25, 2012 at 5:28 am

    I am really confused. I have been looking at radiant cuts but I also like the cushion cut. I went to a store to compare 2 stones in person. The jeweler told me radiants carry most of the weight in the table and the cushion carries their weight in the pavilion, is this true or was just the stones I
    happened to see? I would like to buy the biggest, cleanest diamond within my budget and I’m not sure which will have a larger face, the cushion or
    Radiant? I am not a fan of the round cut and have a princess, but I want something different. Can you please help by giving your expert opinion.

    Reply
    • Mike says:
      January 25, 2012 at 9:54 am

      Hi Monique. The jeweler who told you that was serving you a very nice helping of complete BS. It’s absolutely ridiculous. What I suggest is that you figure out what your budget is, and let me know, and I’ll show you the biggest cushions and radiants I can find for the money and then you’ll simply compare the dimensions of the stones! Use the contact us form to move on to the next step!

      Reply
  7. Mr. Bluth says:
    January 21, 2012 at 3:53 am

    Ira,

    I know you said just reading a cert is almost pointless without seeing the stone, and you are right 100% about chunky vs broken glass as it is never listed, so with that said, can you provide any comments about the statistics of this stone:

    Carats: 1.65
    Clarity: VVS2
    Color: fancy yellow
    depth 65.2%
    table 60.00%
    symmetry: Very Good
    polish: Very Good
    fluorescence: None
    measurements: 7.43mm x 6.20mm x 4.05mm

    Reply
    • Mike says:
      January 21, 2012 at 9:09 pm

      Everything I said is twice as true when it comes to Fancy color stones. You can have two GIA graded “FY” stones that look completely different. You either need to see the stone with your own eyes, or see a high quality photo.

      Reply
  8. Kate says:
    January 13, 2012 at 1:59 am

    Hi Ira,

    I have a question about cushion cut diamonds as well. I have found a ring that I love, a solitaire setting, plain metal ring (no paves, no halo.) The setting holds the diamond in the V formation, with 4 prongs. I was almost completely sold on this ring, but I have now learned that the setting is not ideal for cushion cuts, and the diamond can come loose. What is your advice on this? Would I be safe if I got the ring and had the setting tightened around the diamond every so often?

    Reply
    • Mike says:
      January 13, 2012 at 10:50 am

      Hi Kate. Unfortunately, my professional experience is limited to the loose diamond trade. I’m not really sure I can answer you. But I would definitely lean towards saying if the ring isn’t designed for a cushion, then you should not mount a cushion in the ring. V-prongs are made for stones with sharp corners.

      Reply
  9. Jade says:
    January 11, 2012 at 2:46 pm

    Hi Ira and Mike,

    What does it mean when James Allen etc rate the cusion cut diamonds as Ideal Cut (or Excellent/Very Good cut for that matter). As this is not something that GIA rate how do they come up with this? Is this something I should pay attention to or is this really a case where you really need to see the diamond with your own eyes. Thanks!

    Jade

    Reply
    • Ira Weissman says:
      January 11, 2012 at 5:23 pm

      Hi Jade. Great question. Since there’s no cut grading standard for non-rounds, sites like James Allen do the best they can by creating a grid system based on depth and table %s. It’s subjective, but pretty close to what the rest of the industry would use. The only issue with cushions, though, is that they can have a lot of different “looks” and table and depth won’t tell you what kind of look the cushion will have – only a picture can do that.

      Reply
  10. kevin says:
    January 9, 2012 at 4:32 am

    Hi Ira,
    Your information is second to none and is appreciated by all us novices who will only do this purchase once in their lives. I have done research on sites you recommended and have looked at hundreds so far. Now i have a little help from my girlfriends friend. They took her out and she tried on rings. She likes traditional round but would not be opposed to a cushion. Since she likes a pave setting and i have found a Tiffany replica that will accept a round or cushion, i am torn on what diamond to purchase. I know i will spend more on round. But since she likes “big sparkly rings” in anything she wears, i would like to be able to get a bigger stone but save a little money if possible by going to a cushion. I am willing to spend $8K total on the diamond and setting but would like to spend a little less since we have a house to rehab. I would like to get her a 1 ct. give or take with either stone. can you help me on the stone and if a cushion will have a similar look to a round stone and if its worth going in that direction? i have no problems going with a round stone as the setting choice will then be almost infinite. Thank you in advance….. Kevin

    Reply
    • Ira Weissman says:
      January 9, 2012 at 12:23 pm

      Hi Kevin, if she likes cushions, then this is definitely a way you can save. How much is the setting going to set you back? Let me know so I know how much money you have left for the diamond. Then I’ll send you some suggestions.

      Reply
« Older Comments
Newer Comments »

Leave a Reply

RSS Diamond & Jewelry News

Tell Google you Like us!