Proportions are excellent.

Looks like a diamond that is with the seller based on the date of the report. You may want to visit your seller and have a look.

SI1 can be a good bargain if it is eye-clean.

First diamond seems okay in terms of proportions, can explore further to check on the overall cut quality. Faint fluorescence can reduce the price a little.

Second diamond is not a 3EX, can skip. 41.6 pavilion angle is usually not good.

Third diamond seems okay in terms of proportions, can explore further to check on the overall cut quality. Faint fluorescence can reduce the price a little.

Fourth diamond seems okay in terms of proportions, can explore further to check on the overall cut quality. Strong fluorescence can reduce the price more than faint fluorescence.

Note:
1. Make sure they are eye-clean enough, especially for lower clarity grades, such as SI1, SI2.

2. It is better to see the real diamond in real life or through picture or video. Try not to buy solely based on certificate/grading report.

how do we interpret the second diamond is not 3EX - It is written in the grading report, symmetry is just "Very Good". Triple Excellent simply means grading report should show "Excellent Cut, Excellent Polish, Excellent Symmetry".

As for whether due to pavilion angle or not, I am not sure, but for sure I won't take a 41.6 pavilion angle diamond. Even at 41.4 usually will be leaking light. You can use this Cut Estimator tool at DiamondScreener: https://www.diamondscreener.com/cut-estimator/. Key in the parameters. Look at the actual diamonds that share similar table size, crown angle, and pavilion angle at the bottom section, you will notice that the arrows are not clear at all.

I usually will follow WhiteFlash recommendation: https://www.whiteflash.com/a-cut-above-diam...id=myengringexp (affiliate link). However, do note that some diamonds that are out of the requirement of WhiteFlash can look beautiful too.

You can also refer to Lazare's proportions: https://www.lazarediamonds-sea.com/what-is-...mond.php/lang/s

Both are different brands, their requirement can be slightly different. If you want to know how well a Lazare perform, just visit DeGem.

This post has been edited by kambingkoh: Jun 5 2022, 07:06 PM

They look like pretty good diamonds. I won't know for sure, but the performance should be similar based on the proportions. Both diamonds look lovely. Do note that the 0.33ct has strong blue fluorescence which most likely should be okay, but for peace of mind, if you intend to buy that one, do check with DeGem and make sure the fluorescence does not cause any milkiness.

Sources on internet and also in-store told me that diamonds with fluorescence works best with lower colour grades diamond as it can help to balance off the yellow tint. So if based on colour, I think it will work better with H. But if you ask me in reality what I prefer, I will still need to see the overall price and cut quality, and of course, the carat weight.

I prefer the previous one, as long as the strong fluorescence has no negative impact. The arrows look nicer.

Actually what sort of 4Cs and budget you are looking for (if you don't mind sharing).

These are my choices close to your budget:

https://gia.degemdiamond.com/gia/USH345097 - I like how this looks, it has etch-channel inclusion as the main inclusion, which is one of the none preferred inclusions based on niceice: https://niceice.com/diamond-clarity-grades/. Nonetheless, this is very subjective and you may want to consult with your consultant and see whether this inclusion is a problem.

https://gia.degemdiamond.com/gia/USH420514 - This diamond is very eye-clean since it is a VVS2. Proportions look decent as well. Overall cut quality looks good too unless you want to be picky with the cut quality at the 1 o'clock region. Since this is a diamond from the virtual inventory, I won't complain. If I want a damn clean diamond, this will be it.

https://gia.degemdiamond.com/gia/VSH008585 - This is also not bad for a virtual inventory diamond.

https://gia.degemdiamond.com/gia/USH420514 - This is probably my top choice since it is basically a none fluorescence diamond. Then again, Faint fluorescence is really nothing negative if you ask me, but if you want something close to some "signature" specs, "none" fluorescence is one of the criteria. Whether this is more like a marketing gimmick, is up to individual interpretation.

All the diamonds above fall within AGS Ideal and GIA EX based on DiamondScreener Cut Estimator: https://www.diamondscreener.com/cut-estimator/

I did not use HCA tool, which you can try it on your own (1 day 3 times free).

Overall, try to check with your consultant and see. His/her choice or opinion may differ from mine, but to me, these are worth exploring.

DeGem now has AGS diamonds to sell under their new BrilliantC brand. Diamonds will be AGS0000, including light performance. So probably I should expect IdealScope and ASET scope in their showrooms soon enough.

https://www.tatlerasia.com/style/jewellery/...amond?preview=1

Personally, I won't think that AGS standard is way lower. There can be discrepancy when a diamond is submitted to different lab for grading whereby one lab may say that diamond is D colour while the other the other lab may say is E colour, for example. Last time when Crafted by Infinity (a diamond brand) was still around, their diamonds have Triple Certification with GIA, AGS, and GCAL. From there you can see sometimes AGS will give higher grade, while sometimes GIA may give higher grade, in fact, there is instance whereby both AGS and GIA provide the same grade, while GCAL provide a lower grade. Nonetheless, the results should mostly be one grade apart if there is any discrepancy. Even if the same diamond gets submitted back to the same lab but graded by different peers, the result can be different. Diamond grading is still done by humans as far as I know and there can still be a subjective thing despite they are well-trained.

Another example is that the diamonds I sell sometimes can have H+ or H-. H+ means the supplier thinks that it is G colour, while GIA thinks that it is H, while H- means the supplier thinks that it is I colour, while GIA thinks that it is H. Something like that. (Updated)

Overall, the standard widely accepted in the world is still GIA. So for those people with concern or skeptical with different lab grading, best way is still stick with GIA.

Typical 4Cs are the price determining factor, including cut. But the cut in 4Cs does not determine the actual optical precision. To put in layman, imagine this as an exam, score 70% is grade A, score 90% is grade A, score 100% is also grade A.

My personal preference is actually still with cut quality that includes optical precision and for this AGS can provide more detail. Other labs like IGI or GCAL can also provide more details. All these will depend on the grading report they have chosen to use.

Lazare and Forevermark grade stones themselves. GIA and AGS are independent lab.

At the end of the day, it all boils down to what a person wants. To max value, look for typical GIA diamonds with great optical precision.

Twisted band? You bought your ring dy?

Price hike I won't be surprised. It should be more expensive to be graded by AGS since the diamonds need to send to US. AGS has only one location as far as I know. For GIA, they have multiple branches in the world.

This post has been edited by kambingkoh: Jun 18 2022, 12:53 PM

Based on proportions, I am more inclined to choose the first diamond. It has a small culet though. Preferably it is none.

Nonetheless, try to get the picture or video of both diamonds to make a better judgement.

Both proportions seem not bad, but I will probably get 6224307594 since it has bigger face-up measurements.

Nonetheless, we only have the proportions, we do not have the actual image or video to make better judgement. I won't recommend to buy based on numbers alone.

First diamond is not even Triple Excellent, so it is best to skip it.

Second diamond's proportions look good, but not image or video, best to get it from the seller before making any decision. Also note that this diamond is SI1 with feather inclusion, make sure it is safe enough.

The last ZCOVA diamond, please skip it. It is not Triple Excellent.

This post has been edited by kambingkoh: Jun 26 2022, 11:10 PM

The Audrey diamond has no clear arrows. You can ask them to find diamonds with better arrows. Let them know your budget.

The 2nd diamond has no picture. Hard to tell.

The 3rd diamond has no picture too, but it is not a Triple Excellent diamond, so I won't recommend it.

You can check out with DeGem to find out more on your options.

May I know your budget for 0.6?

The VS1 looks pretty decent. It's a VS1, I won't be bothered by its inclusions. Top view looks eye clean enough. Among these 3, i will say it will be my top choice.

41.4 pavilion angle... use cut estimator and see how similar diamond looks like: https://www.diamondscreener.com/cut-estimator/

You will see that the arrows are mostly blurred out.

Try to ask for options to compare with.

Pretty decent diamond with good proportions. You can check similar table, crown, pavilion diamonds in diamondscreener: https://www.diamondscreener.com/cut-estimator/

Not exactly Hearts & Arrows, but will do fine.

Price is fair enough IMO, considering the service they able to provide.

Looks okay. Can be slightly better for the 6 o'clock arrow. Price wise can be little bit cheaper. 4Cs alone, ZCOVA is slightly cheaper. Then again, you have to see the overall package to compare.

9k for that 4Cs + ring alone is decent enough.

For this you can ask the staff for their opinion. Also, diamond supplier sometimes may have the BGM indicator, which stands for Brown Green Milky. Make sure that is a No.

Lastly, if you still have concerns, try to up the clarity level to VS1.

I thinks someone here mentioned BrilliantEarth before.

Anyway, here you go:
https://bglab.briangavindiamonds.com/?a_aid=myengexp (affiliate link) - Usually starts from 1 carat, I don't know whether they do smaller carat weight or not.

https://blog.zcova.com/2022/06/01/chya-lab-diamond/ - I don't see them listing anywhere on their website, try to message them and ask.

https://www.tailoredjewel.com/tj-beyond/ - You may need to message them to ask further.