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Need help deciding between 2 round stones

A

Along

Rough_Rock
Joined
May 10, 2018
Messages
3
Hi, very confused trying to decide between 2 round stones for a solitaire ring, especially because the crown angle in both cases is lower than the ideal range. Would a low crown angle make a difference while looking at the diamond with the naked eye?
Here are the GIA reports:

VVS2 - https://www.gia.edu/sites/Satellite...ring=ED7AB03ED24901107166ABFE889FE423&qr=null

VS1 - https://www.gia.edu/report-check?reportno=7252576852

I have seen the VS1 and it has a lot of fire, but will not be able to see the VVS2 prior to purchase. The VVS2 is about $500 more but from different sellers. Need some help deciding between the two.

Thanks!
 
Hi Along,
Both the diamonds seem nearly similar cut however they are not the best cuts neither are they bad cuts for optimum fire and brilliance. I think most PSers here have much stricter parameters when it comes to finding a diamond cut for optimum fire n brilliance.
If you can let us know your desired requirements in terms of size, colour, clarity and budget someone will be able to help you find the best value and well cut diamond for your needs.
 
For screening diamonds, start with these parameters.
GIA or AGS (HRD, though less common)
table: 54-58 (I personally prefer the small end of this range)
depth: 60-62.5
crown angle: 34-35.0 (up to 35.5 crown angle can sometimes work with a 40.6 pav angle; I also consider up to 36 with a complimentary pavilion angle and IS or ASET)
pavilion angle: 40.6-40.9 (sometimes 41.0 if the crown angle is close to 34)

Anything within these criteria that meet your color/clarity goals, you can put through the HCA Too.l. https://www.pricescope.com/tools/hca

Not all stones will come up if you type in a GIA number, if so. Delete anything in that field and type in the numbers. This asks if the angles of the diamond (or at least those 4 above) are complimentary. We suggest eliminating from consideration anything 2.0 or above. A few caveats: (1) Its an elimination, not selection tool so 1.9 is not better or worse than 1.0, (2) there are other possible good combos and more experienced PS member may post those, and (3) don't bother with this for AGS 000 or branded super-ideals.

The stones that are left, you can post here for thoughts and helping to narrow your selection. Then, ask for ASET (performance/light return) and H&A will tell us about the cut and symmetry.

My personal opinion buying from an online vendor will give you a better value for your money.
 
Along said:
Hi, very confused trying to decide between 2 round stones for a solitaire ring, especially because the crown angle in both cases is lower than the ideal range. Would a low crown angle make a difference while looking at the diamond with the naked eye?
Here are the GIA reports:

VVS2 - https://www.gia.edu/sites/Satellite?reportno=1192125779&c=Page&childpagename=GIA/Page/ReportCheck&pagename=GIA/Wrapper&cid=1495237976866&encryptedString=ED7AB03ED24901107166ABFE889FE423&qr=null

VS1 - https://www.gia.edu/report-check?reportno=7252576852

I have seen the VS1 and it has a lot of fire, but will not be able to see the VVS2 prior to purchase. The VVS2 is about $500 more but from different sellers. Need some help deciding between the two.

Thanks!
Click to expand...

Hi Along,

This is only an estimation as no one can tell for sure without seeing the diamond. A shallower crown ' might' mean fire or coloured light is down a bit, it's not horribly shallow here but shallower than preferred as you mention, there shouldn't be a potential durability issue as that's usually if a very thin girdle goes with the crown angle at around 32 deg. I think you could get a better balanced diamond if you want to go for the best cut and proportioned stone you can.

Who's the seller?
 
Rpb said:
Hi Along,
Both the diamonds seem nearly similar cut however they are not the best cuts neither are they bad cuts for optimum fire and brilliance. I think most PSers here have much stricter parameters when it comes to finding a diamond cut for optimum fire n brilliance.
If you can let us know your desired requirements in terms of size, colour, clarity and budget someone will be able to help you find the best value and well cut diamond for your needs.
Click to expand...

Hi, thanks for the input. Minimum size requirement is 1.51 carats, 7.45mm, VVS2 or VS1, G or H, triple x with no fluoroscence. Budget is $11.500 max though would like to keep it closer to 11,000.
Would also like to buy from a dealer who has some kind of a return window (makes me more comfortable) and a trade up policy for the future. Thanks!
 
With your budget these are the best options I could find...

https://www.fourmine.com/diamonds/index/diamonddetail/id/D67-20A
https://www.fourmine.com/diamonds/index/diamonddetail/id/92173569
https://www.fourmine.com/diamonds/index/diamonddetail/id/150W735453

If you find any of these good, put it on hold, request for video, aset/ IS images and post them here for any leakages to be spotted.

For best upgrade policy look at White flash options... However you may have to either go lower in colour / size/ clarity or upgrade your budget a little more as these are in super ideal category...
You could also contact IDJ.com and give them the parameters I mentioned and see what they can find for you.
 
Last edited:
Rpb said:
With WF I found these options incase you are flexible....
https://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3202009.htm
https://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3855518.htm
https://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3980392.htm

Happy hunting!!!!
Click to expand...

Thanks for taking the time to post the links. Good options but none of them quite fit my requirements. Given that it seems like I will have to compromise somewhere based on my budget, aren't the original two stones a good option? Which is the better one?
Thanks!

Rpb said:
For screening diamonds, start with these parameters.
GIA or AGS (HRD, though less common)
table: 54-58 (I personally prefer the small end of this range)
depth: 60-62.5
crown angle: 34-35.0 (up to 35.5 crown angle can sometimes work with a 40.6 pav angle; I also consider up to 36 with a complimentary pavilion angle and IS or ASET)
pavilion angle: 40.6-40.9 (sometimes 41.0 if the crown angle is close to 34)

Anything within these criteria that meet your color/clarity goals, you can put through the HCA Too.l. https://www.pricescope.com/tools/hca

Not all stones will come up if you type in a GIA number, if so. Delete anything in that field and type in the numbers. This asks if the angles of the diamond (or at least those 4 above) are complimentary. We suggest eliminating from consideration anything 2.0 or above. A few caveats: (1) Its an elimination, not selection tool so 1.9 is not better or worse than 1.0, (2) there are other possible good combos and more experienced PS member may post those, and (3) don't bother with this for AGS 000 or branded super-ideals.

The stones that are left, you can post here for thoughts and helping to narrow your selection. Then, ask for ASET (performance/light return) and H&A will tell us about the cut and symmetry.

My personal opinion buying from an online vendor will give you a better value for your money.
Click to expand...

Hi, I have read all about optimum criteria,that's the reason I posted that the crown angle is low. What exactly does a low crown angle indicate?
 
Crown angle measurements shallower than 34.2 degrees are likely to produce a higher degree of brilliance (white sparkle). Crown angle measurements steeper than 35.0 degrees are likely to produce a higher degree of dispersion (colored sparkle). Diamonds with a crown angle between 34.3 – 34.9 degrees will usually deliver a virtual balance of brilliance and dispersion.
Personally I would continue to look for something within the parameters of a super ideal.
Do you have an opportunity to see both the diamonds in person? If so, then pick the one that speaks most to you. Also lookout for light leakages. If possible post their aset / IS images if you can get them from the vendor so we can determine which one is better of the 2.
 
you've had good input above. Wanted to add that my wife has a shallow cut diamond like the ones you originally linked. a 32* crown angle will give you a larger spread, but the shallowness can affect sparkle. I'm actually finding that in hindsight, the diamond I got my wife isn't ideal due to the shallow crown. It just looks....well... shallow.
 
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