What makes a perfect cut diamond?

[Moiclaire]

I am familiar with the color & clarity, but not with the perfect cut! What to look for when buying a ring?

 

[kenny]

The best light return.

If you want a round there is a bulletproof simple 2-step process to find a well cut one.
1. HCA, reject rounds scoring over 2.0. https://www.pricescope.com/tools/hca
2. Idealscope, get an Idealscope image on rounds scoring under 2.0 on the HCA. https://www.pricescope.com/tools/ideal-scope

Compare the IS pic to this chart. http://ideal-scope.com/reference-chart-ideal-scope-images/

 

[kenny]

If you want any other shape than round evaluate the light performance with the ASET tool.

http://ideal-scope.com/using-aset-scopes/

 

[diamondseeker2006]

If you want a perfect cut round (also called Hearts and arrows cut), you need to look at Whiteflash ACA's, Good Old Gold Ascendancy, High Performance Diamonds (Infinity), and Victor Canera. That's the easiest way to find them!

 

[Rockdiamond]

The "perfect" cut is totally dependent on a person's desires.
We can say that a round Brilliant is the "best" design for cut.
Super ideal stones are widely agreed to be the "zenith" of cut in round diamonds.
But that does not matter of someone loves a square stone. Or a Cushion.
Then, once you get away from the shape of round, the remarkably rich variety of shapes and types of light performance available mean that there's little agreement about which is best.

 

[Gypsy]

Brian Gavin's Signature line, Infinity Diamonds.

Read this, it might help: [URL='https://www.pricescope.com/community/threads/likelihood-of-finding-a-signature-super-ideal-diamond.174235/']https://www.pricescope.com/community/threads/likelihood-of-finding-a-signature-super-ideal-diamond.174235/[/URL]

 

[Moiclaire]

Thank you for your replies, but Iwas wondering if there was a way of figuring out by reading the % of depht, the measurement of the table..... On the GIA certificate. Is there some limits that you do not want to fall under?

 

[Gypsy]

With a round yes. If you cannot get an idealscope image then you need to conservative.

If you are looking at a 60/60 style stone try to stick to crowns that are 33.5 -35. And complimentary pavilion angles that are 40.6-40.8.

If you are looking for a tolk style, then the same pavilion angles, but the crown should be 34-35. And again, the angles should be complimentary.

How do you know if they are complimentary? You run them through the HCA here: https://www.pricescope.com/tools/hca
Under 2 means it's a pass. Over 2 is a fail. It's a pass fail test.