Perfect Proportions

[SCARLETTE]

I've learned here that cut is king and have seen tables of ranges of "ideal" proportions for a round diamond. However, I am wondering within those ranges, what combination of specific table, depth, and angle proportions would you consider the ultimate best?

 

[Karl_K]

There are many combinations that make for a bright dynamic diamond. There is not one single best combination.

 

[SCARLETTE]

Thanks, @Karl_K, for the input.

I am thinking of potentially re-cutting a diamond and can request specific proportions per the vendor. So glad to know that if I ask them to stick to those "ideal" proportions, it will turn out fine.

 

[Karl_K]

Asking for a combination on the AGS ags0 cutting guidelines that results in the best size retention based on available material would be interesting.

 

[DejaWiz]

I agree with Karl, AGS Ideal would be the range to stick with.

There is also GCAL 8X criteria, assuming this discussion applies to MRB:

 

[SCARLETTE]

@DejaWiz, THANKS for this info! Was trying to do a search and got lost in too many side discussions in old posts.

 

[DejaWiz]

You're welcome, SCARLETTE.
Looking forward to reading more about your diamond recut adventures!

 

[Double E]

Wishing for another successful recut story

Mind to share who’s gonna do the recut for you at current stage?

 

[John Pollard]

PS veterans, if you find them useful you can bookmark these links.

1. PS Proportions chart: Proportions and Visual Tendencies
2. PS Proportions chart: Historically Member Recommended
3. Proportions info: Where to find proportions on various reports
4. Proportions info: What numbers are rounded

That page is also accessible from the main menu.
https://www.pricescope.com/education/diamond-cut/diamond-proportions

 

[Double E]

PS veterans, if you find them useful you can bookmark these links.

1. PS Proportions chart: Proportions and Visual Tendencies
2. PS Proportions chart: Historically Member Recommended
3. Proportions info: Where to find proportions on various reports
4. Proportions info: What numbers are rounded

That page is also accessible from the main menu.
https://www.pricescope.com/education/diamond-cut/diamond-proportions

Thx John for posting these

 

[SCARLETTE]

Wishing for another successful recut story

Mind to share who’s gonna do the recut for you at current stage?

Alex Park - we're in the very early stages of discussion.

 

[Texas Leaguer]

In the space where 3D facet precision is excellent, there is a small range of proportions that work together to optimize light performance. In that space, no single parameter or combination of parameters is necessarily best. At that point it is a matter of personal preference and the visual differences are very subtle.

Once you arrive there, other factors about the diamond have more significance to a purchase decision including size, price, color and clarity features. Someone looking for the best cut quality and light performance should pay particular attention to clarity features that could potentially undermine performance, even in a perfectly cut diamond.