Seasoned Opinion Needed - Which RB Would You Choose?

[D_]

Hi Everyone,

I'm looking at 2 round brilliant diamonds.
Both of them are of the same (or at least similar) carat/size, colour and clarity.
So I'd like to hear your opinion on the subtle difference (if any) based on the measurements and light performance images.

Also, if everything looks good on paper and the performance images are promising, what are some other important factors that can impact the beauty of a diamond which we need to be aware of (something that can be gleaned from looking at all these data/without having looked at the diamonds in person, perhaps something that we can easily overlook but can be significant, e.g. pavilion and/or crown painting and/or digging)?

So, ultimately which one would you choose and why?

Diamond 1
Table: 58%
Crown angle: 34%
Pavilion angle: 40.8%
Crown %: 14.5%
Pavilion %: 43%
Depth: 61.2%
Lower girdle: 80%
Star: 50%
Culet: None
Girdle: M - ST
Fluorescence: None

Diamond 2
Table: 58%
Crown angle: 35%
Pavilion angle: 40.6%
Crown %: 14.5%
Pavilion %: 42.5%
Depth: 61%
Lower girdle: 75%
Star: 50%
Culet: None
Girdle: M - ST
Fluorescence: Faint

Light performance images:
Diamond 1


Diamond 2

 

[solgen]

Since you're looking at H&A diamonds there are some specs you can look at that can help you get nice H&A patterns.


For table 55% is ideal. You'll notice it in the hearts view as the lobes/shoulders are more squared off. As you approach 60% the lobes get pointier. In the arrow view it produces even length arrows and shafts. Notice how in the 58% diamonds the inner part of arrows(shaft) din't quite touch each other. In the 55% the center 8 sides shape will also be a bit smaller.


Lower Girdle halves. 77% is ideal. >77% and you'll notice that the gap between the point of the heart and the white Vs in the center increase. <77% and the points of the hearts will start to touch the Vs. In your two diamonds you can see this effect as one is 80 and the other 75%

Star facet length ideal is 50%. If you notice the black dots around the shafts on the arrows that can be due lower girdle halves >77%. You can also look at the triangles in the star facets to see how symmetrical there are. While diamond one has some clustering around the shafts it has more symmetrical triangles.

So if you look for the above figures and the diamond has excellent symmetry you should get a perfect or super ideal H&A diamond.

The ones you have chosen are still great but not the absolute best. Depending on what patterning you like you an choose specs that should match that.

 

[D_]

Thanks, Solgen.

Will there be a noticeable difference between the above 2 diamonds and a diamond that is closer to the specs you mentioned (for a 1ct diamond)?

I was reading this thread: https://www.pricescope.com/forum/rockytalky/color-vs-size-smaller-g-vs-larger-i-t212813-30.html
(Sunflower's last 3 posts on page 2).
She mentioned about one (G) having more fire, brilliance, fluidness (scintillation too?) than the other one (I).
Both are (super?)ideal cut with superb light performance images.
So I am wondering if this is something we can discern without having looked at the diamonds in person when comparing them.
(Though the I stone has larger crown angle, so technically it should at least have more fire than the G? )

Oh, and about the inner part of arrows(shaft) not quite touching each other - is that due to larger table or larger lower girdle %? (my understanding was the lower the lower girdle %, the fatter the arrows will be, thus the more likely that they touch each other).

 

[solgen]

Thanks, Solgen.

Will there be a noticeable difference between the above 2 diamonds and a diamond that is closer to the specs you mentioned (for a 1ct diamond)?

It really depends but I would have to say under normal viewing conditions probably not. Viewing them at magnification and side by side can really skew perceptions.

I was reading this thread: https://www.pricescope.com/forum/rockytalky/color-vs-size-smaller-g-vs-larger-i-t212813-30.html
(Sunflower's last 3 posts on page 2).
She mentioned about one (G) having more fire, brilliance, fluidness (scintillation too?) than the other one (I).
Both are (super?)ideal cut with superb light performance images.
So I am wondering if this is something we can discern without having looked at the diamonds in person when comparing them.
(Though the I stone has larger crown angle, so technically it should at least have more fire than the G? )

I'd assume the crown and pavilion angles are quite similar and the G stone is deeper then.

Oh, and about the inner part of arrows(shaft) not quite touching each other - is that due to larger table or larger lower girdle %? (my understanding was the lower the lower girdle %, the fatter the arrows will be, thus the more likely that they touch each other).

It's the ratio of both of them. One could be the ideal spec and the other out of range and you'll have a mess.

I think we tend to be overly critical here and nitpick too much. I've seen some stone people would be iffy on or even pass on but they look phenomenal in person. Either of the two you have are gonna be great and beat the vast majority of diamonds out there.