Should I buy this 1.53 RB? GIA

[jessijoni344]

Round Brilliant
Measurements 7.32 - 7.35 x 4.54 mm


Carat Weight 1.53
Color I
Clarity SI2
Cut Grade - Very Good

Finish
Polish Very Good
Symmetry Excellent
Flurorescence None


This is from the GIA certificate. The diamond will cost me 10k. Thanks!

 

[eugchen]

what is HCA score?

is it eyeclean?

have you seen it in person?

 

[tyty333]

Round Brilliant
Measurements 7.32 - 7.35 x 4.54 mm


Carat Weight 1.53
Color I
Clarity SI2
Cut Grade - Very Good

Finish
Polish Very Good
Symmetry Excellent
Flurorescence None


This is from the GIA certificate. The diamond will cost me 10k. Thanks!

No, do not buy...Cut Grade: Very Good is not good enough. You should be looking at Excellent and Ideal cut stones.
https://www.jamesallen.com/loose-diamonds/round-cut/1.51-carat-i-color-vs2-clarity-excellent-cut-sku-2277106
https://www.jamesallen.com/loose-diamonds/round-cut/1.50-carat-i-color-vs1-clarity-excellent-cut-sku-2439793 my favorite

Edit...
Better yet...if this fits in your budget...
http://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3784252.htm

 

[jessijoni344]

those do seem nice. they are probably better options for 10k


dont know what HCA score is. dont see that on the certificate.

it is eye clean. looks great in person but im no expert. could possible get them down a little maybe to 9-9500.

 

[jessijoni344]

Round Brilliant
Measurements 7.32 - 7.35 x 4.54 mm


Carat Weight 1.53
Color I
Clarity SI2
Cut Grade - Very Good

Finish
Polish Very Good
Symmetry Excellent
Flurorescence None


This is from the GIA certificate. The diamond will cost me 10k. Thanks!

No, do not buy...Cut Grade: Very Good is not good enough. You should be looking at Excellent and Ideal cut stones.
https://www.jamesallen.com/loose-diamonds/round-cut/1.51-carat-i-color-vs2-clarity-excellent-cut-sku-2277106
https://www.jamesallen.com/loose-diamonds/round-cut/1.50-carat-i-color-vs1-clarity-excellent-cut-sku-2439793 my favorite

Edit...
Better yet...if this fits in your budget...
http://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3784252.htm

lets take that whiteflash one you posted. looking at the measurements. all 3 are within .02 of each of the stone i posted measurements. does this really significantly affect the cut grade? even though mine is Very Good and that one is Excellent.

 

[Lore]

lets take that whiteflash one you posted. looking at the measurements. all 3 are within .02 of each of the stone i posted measurements. does this really significantly affect the cut grade? even though mine is Very Good and that one is Excellent.

Instead of using the measurements, use these data points instead - this is from the WF diamond:
Depth % 62.3
Table % 55.0
Crown Angle 35.0
Star 50.0
Pavilion Angle 40.6
Crown % 15.5
Lower Girdle % 75.0

Take your original diamond's specifications and feed it into the HCA tool
https://www.pricescope.com/tools/hca

Eliminate any diamond that scores over 2.0 as that indicates a high potential for light leakage. All diamonds scoring under 2.0 are worth examining further. The WF diamond, for example, scores a 0.9 and has GIA excellent scores, so it would be worth considering.

Once you have a short list of diamonds scoring less than 2.0, ask the vendor for the Idealscope and/or ASET images to check for leakage and ask for a hearts image to look for symmetry.

 

[jessijoni344]

thanks. so i plugged the diamond im considering into that and got a 1.8.

"Total Visual Performance 1.8 - Excellent
within TIC range"

lets take that whiteflash one you posted. looking at the measurements. all 3 are within .02 of each of the stone i posted measurements. does this really significantly affect the cut grade? even though mine is Very Good and that one is Excellent.

Instead of using the measurements, use these data points instead - this is from the WF diamond:
Depth % 62.3
Table % 55.0
Crown Angle 35.0
Star 50.0
Pavilion Angle 40.6
Crown % 15.5
Lower Girdle % 75.0

Take your original diamond's specifications and feed it into the HCA tool
https://www.pricescope.com/tools/hca

Eliminate any diamond that scores over 2.0 as that indicates a high potential for light leakage. All diamonds scoring under 2.0 are worth examining further. The WF diamond, for example, scores a 0.9 and has GIA excellent scores, so it would be worth considering.

Once you have a short list of diamonds scoring less than 2.0, ask the vendor for the Idealscope and/or ASET images to check for leakage and ask for a hearts image to look for symmetry.

 

[Lore]

Great - now you should ask for Idealscope and/or ASET images of the diamond.

However, given that it only got a Very Good on cut and polish, I would skip this diamond and find one with Excellent across the board, and then follow-up with checking it against the HCA and studying the Idealscope and ASET images.

 

[tyty333]

Can you post the numbers from the GIA cert (depth, table, crown and pavilion angles) or post the GIA cert number.

 

[jessijoni344]

Can you post the numbers from the GIA cert (depth, table, crown and pavilion angles) or post the GIA cert number.

table 58%

total depth 62%

crown height 14.5

crown angle 35 degree

pavilion angle 40.8 degree

culet size none

star length 55 43%

pavillion depth 43%

id like to make this one work, not sure what a good price would be that i should shoot for.

 

[flyingpig]

Need the GIA report to determine why the stone is only VG cut.

10k or even 9k is too expensive for 1.5 GIA I SI2.

 

[jessijoni344]

Need the GIA report to determine why the stone is only VG cut.

10k or even 9k is too expensive for 1.5 GIA I SI2.

the other stats/measurements i could go back and get a picture of also off the cert, but i did list them above

 

[flyingpig]

Need the full report including the proportion diagram.
Is the girdle very thin or thick?
Those proportions alone don't really explain why it is only VG cut. In fact, those numbers are pretty good
If the girdle is thin~slightly thick, then the girdle could be dug out, painted or both.

 

[jessijoni344]

Need the full report including the proportion diagram.
Is the girdle very thin or thick?
Those proportions alone don't really explain why it is only VG cut. In fact, those numbers are pretty good
If the girdle is thin~slightly thick, then the girdle could be dug out, painted or both.

got the other part.

 

[flyingpig]

ok. now we see the whole picture. VG grading is most likely because of "THICK" girdle.
I guess in this case the thick girdle is alright because the diameter and depth is not significantly affected. 7.30mm+ for 1.53ct is reasonable. I have read many posts by experts and computer-generated ASET/IS that a thick girdle has a minimum effect on light return.

The proportions are ideal with HCA score less than 2.0. You saw the diamond in person and you liked it. It is eye-clean. It is a reasonable consideration.

But, I still don't like diamonds with VG cut grade (it is a mental thing), unless there is a HUGE discount. Also, it is very over-priced for what it is at 9K~10k. For that budget, you should be looking at 1.5ct I VS+ or 1.5ct H SI1

 

[jessijoni344]

ok. now we see the whole picture. VG grading is most likely because of "THICK" girdle.
I guess in this case the thick girdle is alright because the diameter and depth is not significantly affected. 7.30mm+ for 1.53ct is reasonable. I have read many posts by experts and computer-generated ASET/IS that a thick girdle has a minimum effect on light return.

The proportions are ideal with HCA score less than 2.0. You saw the diamond in person and you liked it. It is eye-clean. It is a reasonable consideration.

But, I still don't like diamonds with VG cut grade (it is a mental thing), unless there is a HUGE discount. Also, it is very over-priced for what it is at 9K~10k. For that budget, you should be looking at 1.5ct I VS+ or 1.5ct H SI1

thanks for the help.. if they wont come down further i will pass. but i do like this one and prefer to buy in person. they said 8k now is bottom. dunno