Analyzing proportions

[alleycat]

Hello. I am wondering if someone can list or link me towards a post that shows exactly what you should look for when looking at a round brilliant''s proportions. By this, I mean the Table, Depth along with the crown and pavilion angles.

Table - I believe this should be less than 59%, with many people prefering under 57%?

Depth - Somewhere between 60-63%?

Crown - Not sure about this

Pavilion - I have read that you should always look for this to be under 41 degrees


Please correct any errors I have made and educate me!

Thanks

 

[Lorelei]

Date: 10/15/2007 9:04:59 AM
Author:alleycat
Hello. I am wondering if someone can list or link me towards a post that shows exactly what you should look for when looking at a round brilliant's proportions. By this, I mean the Table, Depth along with the crown and pavilion angles.

Table - I believe this should be less than 59%, with many people prefering under 57%?

Depth - Somewhere between 60-63%?

Crown - Not sure about this

Pavilion - I have read that you should always look for this to be under 41 degrees


Please correct any errors I have made and educate me!

Thanks

Table sizes, in the Pricescope world, many prefer 54 - 57%
Depth - 60 - 62 is a popular range

Crown and pavillion angles, it gets more complicated, so here is a nice thread with possible combinations that Belle posted the other day and you should find it helpful. Some PSers go with crown angle 34 - 35 degrees - pavillion 40.6 to 40.9 but there are many other combos which can work. There is also a ton of reading with discussions about a pav angle being under 41 degrees. Nice girdle combos are thin to slightly thick, med etc - avoid extremes.

https://www.pricescope.com/community/threads/ags-and-gia-cut-comparison-charts.41793/

 

[belle]

thanks lorelei! i was just going to link it again.

very useful that chart is!

 

[Lorelei]

Date: 10/15/2007 9:18:45 AM
Author: belle
thanks lorelei! i was just going to link it again.

very useful that chart is!

Hee!~ Its thanks to you that I posted that one, when you used it the other week I thought that was a great help!