Another diamond help request: Please give me your opinion!

[Matte496]

Hi all,

I am stuck between the choice of two diamonds for my partners engagement ring, that will consist of one brilliant round cut stone in a platinum band.


Diamond 1:
1.38 carat, VVS2, H colour, excellent cut and with zero fluor. The measurements are 7.22 x 7.26 x 4.32mm.
Diamond 2:
1.52 carat, VS2, H colour, excellent cut and with med blue fluor. The measurements are 7.30 x 7.34 x 4.55mm.

Diamond 2 is about $900 more expensive. I think I may be obsessing over carat weight, but want the stone to have as much visual impact as possible! Also, extra cost is not a deciding factor for me.

Thank you so much,
Matt

 

[blingblingdiamond]

I am not an expert but a lot of people here are. You need to them the details on the numbers of the diamonds so they can give you their thoughts. I think 2mm difference is noticeable. The picture below shows diamonds that have around 2mm difference. Hope it helps!

 

[blingblingdiamond]

If both of diamonds have the cut I wouldnt add 900 for diamond 2.... first one has a higher clarity grade and no fluoro which generally considered better. Just my 2 cents

 

[Matte496]

Thanks guys - good to hear your opinions.

I'm guessing this comes down to whether you would sacrifice VVS2 for an eye-clean VS2, and zero fluor for med blue fluor. Both to move up from a 1.38 to a 1.52 carat? What would you do?

 

[ringo865]

What are the angles of each stone? Though they are both "excellent" cut grade, minuscule differences in angles can have a huge impact on light performance.

 

[Matte496]

Hey

I don't believe the dealer I am buying from supplied the angle measurements?

If we assume the angle measurements are the same for each diamond, would you say the clarity and fluorescence factors are a worthwhile trade off to increase from 1.38 to 1.52 carats?

Best,
Matt

 

[ringo865]

Do they have GIA report numbers? Weight and diameter isn't enough to speculate how well these or any stones will reflect light. Ask your dealer for more info. Then ask us to opine.

 

[Matte496]

Ok - I have the AIG references:


Diamond 1 = 1182430641
Diamond 2 = 5243425994

I have plugged these into the Holloway cut score and diamond 1 seems to get a much better score?

Thanks again!

 

[Dancing Fire]

Ok - I have the AIG references:


Diamond 1 = 1182430641
Diamond 2 = 5243425994

I have plugged these into the Holloway cut score and diamond 1 seems to get a much better score?

Thanks again!

AIG reports?..How fast can you run?....

 

[Snowdrop13]

These don't appear to be GIA reports? AIG is not one of the recommended certificates. The most important "C" for a diamond is CUT. You can't tell anything about the cut of either of these stones, they might be dull, lifeless pieces of rock and worrying about the size or fluorescence will be pointless!

Stick to GIA XXX stones to start with. Or tell us your budget and we'll find you something great.

 

[Matte496]

Hi,

Yes the numbers I gave you were the GIA Report Numbers - I have both certificates that have GIA written in the top left?

Both are from Bluenile- I think they only do GIA dianonds?

Thx

 

[Snowdrop13]

I can't seem to find them on the GIA report check tool- can you put up the BN links?

Edit- found them!

The angles on the larger stone are well away from what is usually recommended:

These are measurements to help you stay in ideal cut territory with a GIA excellent cut stone, try to stick to these, you can put table and depth into the BN search engine.

table: 54-58
depth: 60-62.3
crown angle: 34-35.0
pavilion angle: 40.6-40.9 (sometimes 41.0)

The second stone has better numbers but is a 60/60 style stone (there are several threads on these if you search).

 

[Matte496]

Ok - so diamond 1 is a better cut (it gets a holloway score of 1.6)

What about if we swap diamond 2 for GIA Ref 7261454811?

Would you still go for diamond 1?

Thanks so much, you are being a great help!

 

[Matte496]

Also, regarding your comments surrounding 60/60 diamonds...are these generally considered a bad cut? The information on PS appears quite conflicting regarding this subject...

 

[msop04]

I am not an expert but a lot of people here are. You need to them the details on the numbers of the diamonds so they can give you their thoughts. I think 2mm difference is noticeable. The picture below shows diamonds that have around 2mm difference. Hope it helps!

Just wanted to say that the difference isn't 2.0 mm, it's 0.08 mm, which is only a 2% difference and will not be noticed AT ALL.

 

[msop04]

Also, regarding your comments surrounding 60/60 diamonds...are these generally considered a bad cut? The information on PS appears quite conflicting regarding this subject...

It's a preference, Matte... Some love them, some don't care for them. Also, some have great performance, some aren't as good. I love 60/60 type stones bc I like the extra size and white light they throw.

 

[msop04]

Matte, here is a visual, so you can see the difference in size for the two stones.
1.38 on left, 1.52 on right -- 2% difference is NOT worth an extra grand!

 

[msop04]

Can you please provide links to these?

 

[Matte496]

Hi msop - thank you so much for your help, it has really helped me out!

Diamond 1 I have bought so link not available anymore. However I have posted GIA Ref above.

Diamond 2 is here:
https://www.bluenile.com/uk/diamond-details/LD08440460

Thanks!

 

[msop04]

Hi msop - thank you so much for your help, it has really helped me out!

Diamond 1 I have bought so link not available anymore. However I have posted GIA Ref above.

Diamond 2 is here:
https://www.bluenile.com/uk/diamond-details/LD08440460

Thanks!

You're very welcome, Matte -- Glad to help!

Diamond 1 scored 1.6 on the HCA, while Diamond 2 had a horrible HCA 5.2 -- AND it was more expensive!! I'd say you made a great decision!

 

[Matte496]

Thanks msop- I think more luck than judgement on my behalf!!

All the best,
Matt

 

[msop04]

Thanks msop- I think more luck than judgement on my behalf!!

All the best,
Matt

HA! You did the research and came to PS for additional help -- don't sell yourself short!
Don't forget to come back and post lots and lots of photos!!

 

[Matte496]

Msop - the diamond I have ordered is a 60:60 but falls within the top cut grades for both GIA and AGS (EXC/0).

From reading posts on 60/60 diamonds from other Pricescope members I am being led to believe that the diamond may perform badly?

Do you think that, despite the top cut grade, this is likely to be true?

Best,
Matt

 

[blingblingdiamond]

Just wanted to say that the difference isn't 2.0 mm, it's 0.08 mm, which is only a 2% difference and will not be noticed AT ALL.

It is 0.31mm difference for the two diamonds in the picture I showed.. but you are right that its not 2.0mm.. for some reasons, i typed 2.0 mm instead. I think i meant to type 0.2mm .. i dunno what was going on in my head... too tired after work..

 

[blingblingdiamond]

sorry for the confusion!

 

[msop04]

Msop - the diamond I have ordered is a 60:60 but falls within the top cut grades for both GIA and AGS (EXC/0).

From reading posts on 60/60 diamonds from other Pricescope members I am being led to believe that the diamond may perform badly?

Do you think that, despite the top cut grade, this is likely to be true?

Best,
Matt

NO, that is not true at all! It's all dependent on whether or not the angles work well together (just like with diamonds cut to more "ideal" proportions). My 60/60 is a firecracker!

 

[msop04]

I wanted to add that some PS members don't care for 60/60 stones... it's a matter of preference. They will throw more white light at the expense of fire (the colored light flashes). However, my 60/60 has fire -- maybe not as much as a stone cut to more "ideal" proportions, but it has it nonetheless. AND it's BRIGHT & faces up more like an "ideal" cut 3.5-3.6 ct (it's 3.33 ct @ 9.8 mm). I couldn't be more pleased.

 

[Texas Leaguer]

Msop - the diamond I have ordered is a 60:60 but falls within the top cut grades for both GIA and AGS (EXC/0).

From reading posts on 60/60 diamonds from other Pricescope members I am being led to believe that the diamond may perform badly?

Do you think that, despite the top cut grade, this is likely to be true?

Best,
Matt

As Msop said, the general proportions of the stone will tend to favor brightness over fire. But technical performance will depend on the optical precision of the cut, which is unknowable from the report alone since the measurements are averaged and rounded. Likely you will find the stone to be very pretty. Whether is is a top performer is something nobody can predict with the available information.