Has anyone ever calculated the Table to Depth Ratio?

Nicrez · Sep 17, 2004

Alright, I know I have been MIA for some time. I apologize and I wave a big big hello to everyone. Wedding planning, and getting my guy ready for his business school applications and me getting ready for my GG classes in Oct...

The thing is, my friend has asked me to do a "precision search" on a stone he is looking to buy. It''s about a 1.5 princess, E, VS1 or VS2. I have gotten it into my head to calculate surface area, to find a "larger looking" stone.

So here''s the question: Has anyone taken the table percentage and compared it to the depth percentage, in order to find the ratio of the stone? Obviously a misproportioned stone will have either a table that is too large or a depth that is too large and the T to D ratio will reflect it. Am I calculating this wrong, or should I use the measurement in mm or each, instead of percentages, which isn''t as precise?

Also, if anyone has done this, what would the optimal numbers be?

Tell me if I am nuts and have waaaay too much time on my hands...?

valeria101 · Sep 17, 2004

Welcome back Nicrez !

Er... just three things;

#1. A princess cut with 60% table and 65% depth would have the same T/D ratio as one with 73%table and 80% depth.

#2. Did you see those formulas for weight estimation at Nice Ice? (LINK) You can always work them in reverse, guessing what the dimensions would be at best for a weight range.

#3. Girdle thickness is more important than depth if you want to find the largest well-cut stone in a weight range.

Bottom line? Why not just compare the surface areas instead of table & depth?

Nicrez · Sep 17, 2004

Thanks Ana!

I have not done a lot of princess searches, but I wanted to give him the largest stone for his buck, with the best cut, so it's an uphill battle....

The Nice Ice site is great, I will read through it, as it seems I have never read through it before...

Sometimes, I just suppose that I want to find a way to determine symmetry and precision standards in these very wide ranges of cuts... I am failing miserably...