(Closed) Which diamond to choose?

posted 4 years ago in Rings
Post # 3
2188 posts
Buzzing bee
  • Wedding: March 2024

Wow very specific, I don’t know much about diamonds but wanted to say if you don’t get a lot of feedback on WB I’d try going to Pricescope forms and asking the jewelry gurus.

Post # 4
4417 posts
Honey bee
  • Wedding: December 2010

Which one is prettier?  Whichever one it is, that’s the one you should choose.  If you can’t tell the difference between them looking at them in person, then choose the less expensive one. 

Post # 5
11284 posts
Sugar Beekeeper
  • Wedding: April 2012

have you seen them in person?  which one looks better?  if they look the same, take the less expensive one (which happens to be slightly larger).

Post # 7
367 posts
Helper bee
  • Wedding: September 2014

Not enough information to tell you, sorry.

I recommend posting your question on RockyTalky on Pricescope.com and providing the full details from the GIA report. If you can run the numbers through the Holloway Cut Adviser (see Google), that’ll give you an indication of which one might be better and help you narrow down your options. As the cuts on both are only very good though, it might not much help. The folk on Pricescope will ask you to get an Idealscope image or ASET to compare the performance of the stones – ask them for more information on what this is and then contact your jeweller.

Post # 8
547 posts
Busy bee
  • Wedding: June 2014

@Letsy29:  Who did the grading? What are the pavilion and crown angles? I’m personally not a fan of either. 

Post # 9
3830 posts
Honey bee
  • Wedding: August 2013

@Letsy29:  i would choose the second one. it’s an H color diamond…you should go with the one with no fluorescence.

Post # 10
2300 posts
Buzzing bee
  • Wedding: June 2015

the first will likely look noticeably whiter (2 to 3 colour grades) than the second due to the fluoresence – i’d go for the first!

Post # 13
163 posts
Blushing bee

To be honest, I wouldn’t choose either one. Cut is everything in a diamond, and there’s a reason why they both only scored a Very Good score.

Diamond 1 has a deep depth and the pavilion degree is too large. Diamond 2 has a horribly shallow crown and depth, which is why its larger face up. While being larger does sound good, it won’t sparkle like an ideal cut diamond

I definitely recommend creating a thread on Pricescope, and posting your budget and target size, and see what they can come up with. I’m not sure if I’m allowed to suggest stones for you here on WB.

If you choose not to, I strongly recommend you stick with GIA Excellent or AGS 0 (Ideal) cut grades only, even if you have to drop down in size. Also, flouroescence isn’t anything to be worried about 99% of the time, as it’s rare for it to negatively affect the diamond. It’s been given a bad reputatation by jewellers, but a GIA study confirmed that it’s almost never a problem.  

This is a cheat sheet for angles you want to aim for. Not to say that a diamond can’t be pretty if it’s outside these ranges, but it shows what a Tolkowsky/’ideal cut’ diamond angles are

Depth: 60% – 62.4% 
Table: 54% – 57%
Crown angle: 34 – 35
Pavilion angle: 40.6 – 41
Girdle: Avoid the extremes, such as very thin/thick

Post # 14
1660 posts
Bumble bee
  • Wedding: August 2015

@plantobee:  I agree with everything here.


Cut is definitely the most important. I remember going from a .75 Signature Ideal cut from Blue Nile to a .76 Very Good cut and holy hell did I regret that decision. Price was a factor but the diamond seemed so dull compared to the old one.

Post # 15
163 posts
Blushing bee

I forgot to mention, if you’re buying an SI1 or lower online, ask the vendor to check with their gemologist if there are any visible inclusions from a distance you choose. Their definition of ‘eye clean’ may be a person with 20/20 vision looking from a distance of 10 inches, while you may mistake that as not seeing any inclusions at all from any distance.

Most of Blue Nile’s inventory is not in-house, and they will most likely never actually see the diamonds personally, but they can ask the jeweler who they are getting the diamonds from to check for you. 

Post # 16
4417 posts
Honey bee
  • Wedding: February 1997

The first stone only ranks a 5.5 on the HCA, while the second is a 2.7. The second will be a better performer, but ideally an HCA score should be under 2 for optimal light performance. See if you can find an ideally cut stone (excellent) in your price range instead. Very Good in terms of cut is usually not very good at all. Be sure to ask Blue Nile about the fluoro. Generally, a medium level is not only acceptable, but desirable in an H coloured stone and should not affect performance at all except to make it appear whiter. But they will be honest about whether, say, a stone with strong blue will affect it visually. Many people will tell you to avoid a stone with fluoro, but in terms of an H stone I consider it a good thing.

But I second the idea of going to PriceScope. They will address your questions much better (from a better knowledge base) than here and they can even suggest alternative stones in your price range if you give them your price criteria. Good luck.

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