Super ideal or excellent cut? help me decide!

posted 1 month ago in Rings
  • poll:

    smaller, super ideal cut

    larger, excellent cut

  • Post # 2
    Member
    130 posts
    Blushing bee
    • Wedding: April 2002

    The table and depth are also very important, it is good to know length to width ratio. Do you have that information? Just from the pictures alone, the second stone looks better. The closer you are to a 1.00 with length to width, the better cut the stone is and the more it will sparkle.

    Post # 4
    Member
    1909 posts
    Buzzing bee
    • Wedding: August 2018

    View original reply
    @melihbee:  Are these lab diamonds graded by the IGI? I ask because depending on the grading house, sometimes excellent is the highest cut grade possible and other times ideal is. Super ideal is only assigned by retailers in order to be able to charge more for the stone. 

    Please share the crown and pavilion angles as those proportions (in combination with the table percentage) really tells us about the diamond’s likely light performance! 

    Post # 6
    Member
    1909 posts
    Buzzing bee
    • Wedding: August 2018

    View original reply
    @melihbee:  I have an IGI graded lab diamond and it is stunning and outperforms any mined GIA graded diamond it’s been compared to. GCAL is good for showing light performance but you can find an equally beautiful IGI diamond if you know what you’re looking for. I took my time, carefully selecting my diamond based on the proportions I mentioned in my last comment. Though I think I got lucky with the color and clarity being higher than even the GIA would have graded it. 

    Edit: to add that my lab diamond was purchased after already owning two mined diamonds, and I love the quality of my lab. Researching was well worth it! 

    Post # 8
    Member
    1909 posts
    Buzzing bee
    • Wedding: August 2018

    View original reply
    @melihbee:  that’s great! Can’t wait to see it when you get it ☺️ 

    Post # 9
    Member
    130 posts
    Blushing bee
    • Wedding: April 2002

    Congratulations on your new diamond. I have recently found a love for lab diamonds also, they are so beautiful and seem to sparkle like crazy. 

    Post # 10
    Member
    478 posts
    Helper bee

    Based on the images, Diamond 1 looks the most promising of the three.  But it’s impossible to say without the rest of the specs (crown angle/pavilion angle, crown height/pavilion height, etc.). If you truly want the best cut, for starters the face up image should look more like the pic below (notice the 8 distinct arrows with very little darkness in between).  That increases the likelihood of the angles working well together, resulting in the best performance in a variety of lighting.  IGI’s parameters for “excellent” and GCAL’s parameters for “super ideal” are much more broad and generous vs. GIA and AGS, which have higher standards for their cut grades.  That’s not to say you can’t find great cuts with IGI or GCAL, but you can’t rely on their labeled cut grades alone.  Of course, not everyone cares about cut intricacies, but if you are interested check out the forums on pricescope (they have a separate forum for lab diamonds). GLD

    Post # 11
    Member
    501 posts
    Busy bee
    • Wedding: December 2018

    I would type the dimensions of the diamonds you are considering into the HCA tool on pricescope. You can get a GIA XXX which is actually very poorly cut (this is what happened to me, whoops!) But you can also get a really well cut stone without paying the premium of a “Super Ideal” If i were to do it over, that is what I would do. The dimensions the pricescop reccomends are:

    Table: 54-57 (up to 58 possible)

    Depth: 60-62.3

    Crown angle: 34.0-35.0 (up to 35.5 may work with pav angle closer to 40.6)

    Pavilion angle: 40.6-40.9 (up to 41 may work IF the crown angle is close to 34.0)

     

    ETA: I think that the darker shad you see in the middle onthe 3rd one is due to cut, not an inclusion. This will affect light return and is probably leakage (this is what my diamond has) and it some lights it will be fine, and others, not so much!

    Post # 13
    Member
    501 posts
    Busy bee
    • Wedding: December 2018

    View original reply
    @melihbee:  would you mind sharing your budget? The last one you posted doesn’t look great IMO and you can likely do a lot better depending on budget!

    Post # 15
    Member
    7885 posts
    Bumble Beekeeper

    The first one looks the best cut. I wouldn’t buy the second one personally (hard to tell if the black center is camera reflection/obstruction or poor cut) but if you can see it with your own eyes it should help. If you have a healthy credit card limit, you could buy your top 2 and compare them side by side in real life. Your eyes will be the best judge. Then return the one you don’t love. 
    Just remember ‘excellent’ is an extremely broad category, and many not-so excellent cuts get lumped in there. A smaller better cut diamond will out sparkle a larger one hands down.

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