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To Cut Nut : About ideal cut defined by hca

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PtlOO

Rough_Rock
Joined
May 11, 2002
Messages
3
Dear Sir,

I've read through the tutorial, really amazing introduction, thank you for your kind work. i compared carefully between the worst case you presented for AGS 0 ,Tolkowsky Ideal and also with the stone I plan to buy,
following table is the comparison.

Table / Crown Angle / Pavilion Angle / Pavilion %
The Worst AGS 0 57 35.8 41.25
Tolkowsky Ideal 53 34.5 40.75 43.1
The one I found 55 34.2 41.2 43.4

you see, the difference is not too much, at least for such layman like me. Would you give me some advise on the diamond I find comparing with the ideal cut defined in your theory? Thank you very much!
 

Garry H (Cut Nut)

Super_Ideal_Rock
Trade
Joined
Aug 15, 2000
Messages
16,716
If this chart comes out you will see how critical the small increase in pavilion angle has on the stone you are considering.
Have you discovered HCA yet? - the third link at the top - Cut Adviser.

Sorry the chart did not come out, but if you would like to read more detail then www.diamond-cut.com.au will bore you to tears:)
 

pricescope

Ideal_Rock
Joined
Dec 31, 1999
Messages
8,266
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