What is brillianteering?

[Mekp]

I'm looking at 1/2 ct diamonds for a planned RHR. I came across a GIA certificate that had a comment I haven't seen before "cut grade affected by brillianteering". The cut grade is very good but the proportilns actually look pretty good to me. What is brillianteering?

https://bnsec.bluenile.com/bnsecure/certs/LD13373300/GIA?country=USA&language=en-us

 

[1ofakind]

Brillianteering: Diamond Glossary | Blue Nile

Learn about brillianteering, the final stages in the diamond cutting process, and how this process may affect a diamond's cut grade.

www.bluenile.com

What is Diamond Brillianteering? | Whiteflash

Brillianteering is the final stage of the cutting process where the upper and lower facets of a diamond are polished. Find out more about this at Whiteflash.

www.whiteflash.com

 

[flyingpig]

The diamond has at least significant crown painting for sure. Very visible in the video from the side and facelup

It is a bit of oopsie for the cutter.
1. Achieved 0.5c. check
2. Achieved ideal and gia ex proportipns. check.
3. Ex symnetry, and polish. Check.
4. Too much girdle treatment. F###

 

[Mekp]

The diamond has at least significant crown painting for sure. Very visible in the video from the side and facelup

It is a bit of oopsie for the cutter.
1. Achieved 0.5c. check
2. Achieved ideal and gia ex proportipns. check.
3. Ex symnetry, and polish. Check.
4. Too much girdle treatment. F###

Thank you, that really helps!

 

[daisygrl]

Can brillianteering be done on super ideal cuts as well? Or is it intended for just mediocre stones to improve their quality?

 

[flyingpig]

All diamonds have some degrees digging and painting. In case of most super ideal cuts here, it is very minor.

WF once used to cut some ACA with high degree of crown painting to increase edge to edge brightness.

Painted

Diamond | 0.946 ct F VS2 A CUT ABOVE® Hearts and Arrows Super Ideal Round Cut Loose Diamond AGS Certified | 3328831

This Whiteflash A CUT ABOVE® super ideal cut hearts and arrows 0.946 carat F color VS2 clarity loose diamond is graded by the American Gem Society (AGS) Laboratories. | 3328831

www.whiteflash.com

Classic girdle

Diamond | 0.911 ct E VS1 A CUT ABOVE® Hearts and Arrows Super Ideal Round Cut Loose Diamond AGS Certified | 4196131

This Whiteflash A CUT ABOVE® super ideal cut hearts and arrows 0.911 carat E color VS1 clarity loose diamond is graded by the American Gem Society (AGS) Laboratories. | 4196131

www.whiteflash.com

You can easily tell in the IS amd ASET.
They do not do this anymore.

 

[daisygrl]

All diamonds have some degrees digging and painting. In case of most super ideal cuts here, it is very minor.

WF once used to cut some ACA with high degree of crown painting to increase edge to edge brightness.

Painted

Diamond | 0.946 ct F VS2 A CUT ABOVE® Hearts and Arrows Super Ideal Round Cut Loose Diamond AGS Certified | 3328831

This Whiteflash A CUT ABOVE® super ideal cut hearts and arrows 0.946 carat F color VS2 clarity loose diamond is graded by the American Gem Society (AGS) Laboratories. | 3328831

www.whiteflash.com

Classic girdle

Diamond | 0.911 ct E VS1 A CUT ABOVE® Hearts and Arrows Super Ideal Round Cut Loose Diamond AGS Certified | 4196131

This Whiteflash A CUT ABOVE® super ideal cut hearts and arrows 0.911 carat E color VS1 clarity loose diamond is graded by the American Gem Society (AGS) Laboratories. | 4196131

www.whiteflash.com

You can easily tell in the IS amd ASET.
They do not do this anymore.

Thank you for the explanation. I definitely did see the painting on the first one - it looks very unnatural, odd even. The second one was the usual one that you see nowadays.

 

[Karl_K]

When it comes to diamond cut everything is a compromise.
All red IS marketing
Cheaper 8* alternative
Trade off was watery scintilation that gets GIA VG cut grade now .