Feedback Round Diamond - Crown & Pavilion Angle

[dia2025]

Hello - this is my first time posting and I need this forums help! I am currently looking for a natural diamond and have been presented an option (details below). I am specifically unsure when it comes to crown and pavilion angle, as the crown angle seems to be higher than what is recommended. However, I understand that both and also other specs of the diamond need to be in harmony. This is a 4.03 ct and within my budget there are not too many options (I have to make a trade-off somewhere). Any feedback is highly appreciated!

Depth	62.7%
Table	58%
Crown Angle	36.2°
Crown Height	15.5%
Pavilion Angle	40.9°
Pavilion Depth	43.0%
Polish & Symmetry	Excellent
Lower Half	80%
Girdle	Medium (Faceted)

 

[MissGotRocks]

Have you seen this diamond in person? Is there a video of it? Definitely not recommended specs and almost certainly will show light leakage. Is there a budget and is 4 carat a size requirement?

 

[dia2025]

Thank you, please find a video here. Also happy to receive other feedback based on the video. 4 carat+ would be ideal but understand that a bit below could look very similar in actual size. I have not seen it in person (yet).

 

[dia2025]

Some additional videos, thanks
1
2

 

[dia2025]

There is an error in my initial post - please ignore the line lower half.

I also got presented a second option with better clarity, a 3.8 ct. The crown angle and other stats seem better in my opinion, but happy to get your expert thoughts .
Video
Video 2

Depth	62.9%
Table	57%
Crown Angle	35.9°
Crown Height	16%
Pavilion Angle	41.1°
Pavilion Depth	43.5%
Polish & Symmetry	Excellent
Girdle	Medium (Faceted)

 

[lovedogs]

What's your budget and color/clarity preferences? I strongly dislike the 2nd option. Looks very leaky and "splintery"

 

[kenny]

You're looking for a round diamond.
Lucky you, because there is a brilliant tool, called HCA, that takes several interacting specs, crunches the math, and gives you a Light Performance "score".
We recommend a score between 1 and 2.

The HCA (Holloway Cut Adviser) is found under the pull down menu above for RESOURCES




Read all about the HCA.
Then use it to evaluate the cut quality of the rounds you are considering.
I haven't used it in years, but I think you get to use it 3 times for free, then after that there's a small fee.

If you find a diamond between 1 and 2, it is a candidate for further evaluation with Idealscope picture.
HCA is considered a rejection tool, not a final acceptance tool.

Idealscope info is on the same pull-down menu as the HCA.

Enjoy your diamond safari.

 

[dia2025]

Thanks all - the HCA scores are 4.4 and 4.9 respectively, but need to make it work within my budget, which is ~54k USD including the band.
The first diamond (4.03ct) returned GOOD for all light return, fire & scintillation; very good for spread.
I understand for the budget and my criteria (4ct/H/VS2/Ex Polish, Symmetry, Cut, None Fluorescence) that I will need to make some trade-offs.

 

[dia2025]

Is going for NONE fluorescence worth it or should I consider faint as well?

 

[MissGotRocks]

Thanks all - the HCA scores are 4.4 and 4.9 respectively, but need to make it work within my budget, which is ~54k USD including the band.
The first diamond (4.03ct) returned GOOD for all light return, fire & scintillation; very good for spread.
I understand for the budget and my criteria (4ct/H/VS2/Ex Polish, Symmetry, Cut, None Fluorescence) that I will need to make some trade-offs.

Would not be a concession that I would be willing to make. In a diamond this large, any deficits will show even more.
Faint fluorescence would be fine. What is the color and clarity range you are considering?

 

[tyty333]

Is going for NONE fluorescence worth it or should I consider faint as well?

No, go for faint and even higher(med) if you are trying to keep the budget down and the carats high.

At these levels, there should be no adverse effects. Double check by asking the vendor/Sales Associate, though.

 

[freddyboston]

HCA Excellent should be the #1 priority filter setting and then see what you can get and start making tradeoffs (color/size/clarity)

 

[lovedogs]

Faint and med fluor almost never have detrimental effects on diamonds. I wouldn't want a big but poorly cut stone

 

[tyty333]

Whiteflash has this...it is strong Blue though. You'd have to talk to WF to see if it has any issues.

Diamond | 4.29 ct I VS2 Round Cut Loose Diamond GIA Certified | GIA2235378743 | GIA

This fabulous 4.29 carat Round Excellent cut diamond has a clarity grade of VS2 and color grade of I.It is a great choice for those seeking the finest in diamond cut. | 170134734 | GIA

www.whiteflash.com

I know it's not "perfect" but something has to give.

 

[lovedogs]

Not the size you want but a much nicer cut

https://www.jamesallen.com/loose-diamonds/round-cut/3.50-carat-h-color-vs2-clarity-excellent-cut-sku-22068746

Basically rhe size you want and the cut is pretty good.

https://www.jamesallen.com/loose-diamonds/round-cut/3.92-carat-h-color-vs1-clarity-excellent-cut-sku-23995577

Neither of these are perfect, but better than the ones you have now IMHO

 

[dia2025]

Thanks everyone - I will for sure decline the 3.8ct and try to get the 4.03ct shipped to the store to view it. The more research I do the more I am leaning towards not going for IGI but going for GIA at the cost of colour (change from H to I). I will also add fluorescence faint and medium.

 

[dia2025]

Whiteflash has this...it is strong Blue though. You'd have to talk to WF to see if it has any issues.

Diamond | 4.29 ct I VS2 Round Cut Loose Diamond GIA Certified | GIA2235378743 | GIA

This fabulous 4.29 carat Round Excellent cut diamond has a clarity grade of VS2 and color grade of I.It is a great choice for those seeking the finest in diamond cut. | 170134734 | GIA

www.whiteflash.com

I know it's not "perfect" but something has to give.

Thank you - I am not sure about the strong blue, but have found this one (HCA 0.6) https://www.whiteflash.com/loose-di...rity-round-excellent-cut-sku-4747208?a_aid=PS .

 

[TXwidow]

Thank you - I am not sure about the strong blue, but have found this one (HCA 0.6) https://www.whiteflash.com/loose-di...rity-round-excellent-cut-sku-4747208?a_aid=PS .

that is a much better cut than the stones you first suggested (#1 and #2). Those two stones not only had terrible angles (why the high score numbers on HCA) but were also cut 'deep'. Try comparing the diameter of all three stones.

 

[lovedogs]

Thank you - I am not sure about the strong blue, but have found this one (HCA 0.6) https://www.whiteflash.com/loose-di...rity-round-excellent-cut-sku-4747208?a_aid=PS .

This is much better. Ask them for a video, but the proportions are much more promising than either of the first 2 you posted.

 

[freddyboston]

just throwing this 4.16 H Strong Bl one out there... looks like could be eye clean Si1

https://www.jamesallen.com/loose-diamonds/round-cut/4.16-carat-h-color-si1-clarity-excellent-cut-sku-24851927?

 

[tyty333]

Thank you - I am not sure about the strong blue, but have found this one (HCA 0.6) https://www.whiteflash.com/loose-di...rity-round-excellent-cut-sku-4747208?a_aid=PS .

You'll need to call Whiteflash and ask them for a photo of this stone (and anything else related to the stone).

BTW...WF can do aset images/pics/videos if you work with them.

 

[MissGotRocks]

I would far rather deal with Whiteflash. They can do images and honest assessments of the diamond.

 

[Lookinagain]

You'll need to call Whiteflash and ask them for a photo of this stone (and anything else related to the stone).

BTW...WF can do aset images/pics/videos if you work with them.

If there is no photo or video on the WF site does that indicate that the stone is not in-house?

 

[MissGotRocks]

If there is no photo or video on the WF site does that indicate that the stone is not in-house?

Probably. I am not sure what their criteria is to bring in a stone either. I am sure there are restrictions - else many would request many different stones for assessment. Hopefully the poster gives them a call to inquire. They truly are friendly and customer orientated so no need to hesitate.

 

[dia2025]

I have instructed a new search and received another option, this time its a 3.73ct GIA, I, VS2, Excellent, Excellent, Excellent, None Fluorescence.

Seems better than the initial IGI ones, have requested detailed videos.

Depth	62.4%
Table	58%
Crown Angle	36°
Crown Height	15.5%
Pavilion Angle	40.8°
Pavilion Depth	43.0%
Polish & Symmetry	Excellent
Girdle	Medium-Slightly Thick (Faceted) 4.0%
Measurements	9.79 x 9.87 x 6.13 mm

 

[tyty333]

If there is no photo or video on the WF site does that indicate that the stone is not in-house?

I would imagine the stone is not in-house, but they may be able to get more info from whoever has the stone and see
if its a decent stone worth bringing in.

 

[freddyboston]

I have instructed a new search and received another option, this time its a 3.73ct GIA, I, VS2, Excellent, Excellent, Excellent, None Fluorescence.

Seems better than the initial IGI ones, have requested detailed videos.

Depth	62.4%
Table	58%
Crown Angle	36°
Crown Height	15.5%
Pavilion Angle	40.8°
Pavilion Depth	43.0%
Polish & Symmetry	Excellent
Girdle	Medium-Slightly Thick (Faceted) 4.0%
Measurements	9.79 x 9.87 x 6.13 mm

is it Oct 17 '24 report date ?
Adiamor has listing w/ video for this one....

40.6 / 80 Lowers would be better/ "Ideal"
(Clouds not shown...)

 

[dia2025]

is it Oct 17 '24 report date ?
Adiamor has listing w/ video for this one....

40.6 / 80 Lowers would be better/ "Ideal"
(Clouds not shown...)

Thanks, yes it is actually that one (I am not based in the US but I suppose my local shop that I am working with can source from everywhere). This is the video . Just the first option received, but to me it looks visually way better already than the IGI (even the color despite being a I and not a IGI H).

I have seen "clouds not shown" on many GIA reports - what is the major concern with this?

 

[dia2025]

You'll need to call Whiteflash and ask them for a photo of this stone (and anything else related to the stone).

BTW...WF can do aset images/pics/videos if you work with them.

This is so far the only diamond I have found that has a better HCA score than 2, however I am also open to a lower HCA (3 or better) due to my budget. I will check with my store (not US) if they can consider getting this diamond and additional information. It is also listed here .

On fluorescence: Do I need to be worried that this is MEDIUM?

 

[freddyboston]

i don't understand why you are even considering sacrificing cut quality because of budget when the budget is 50k....
fluorescence fears are way overboard...
example here's a recent pick up - small Very Strong Blue D (super $discounted IF
outdoors diffuse light shade/ outdoor direct sunlight / uv torch

also rounds never look great in in direct sun.. they generally go dark... so what matter if they are also a bit less contrast or slightly hazy....