how to calculate adjusted depth for rectangular radiant

[kmystery]

Hi

I was wondering whether there was a formula to calculate the adjusted depth for a radiant (l/w 1.32).

Thanks

 

[Rockdiamond]

Great question,
Stan Grossbard who posts here occasionally as "RadiantMan" developed exactly what you are asking about.
If you so a search for "Original Radiant Cut" you will probably find posts by him- there's a link to the Original Radiant website ( where you'll find an explanation) in his signature.

 

[kmystery]

Thanks for that, I have been on to the original radiant cut website, but couldn't see details of the calculation. I know that you judge radiants by eye rather than purely by number though, this was just to dot the i's and cross the t's!

thanks

 

[Diamond_Hawk]

The difficulty with calculating any of the measurements for a radiant cut is the pure number of variables in the cut process as it combines straight edges, long (step-cut) facets and triangular (brilliant) facets. Your best bet with a radiant cut is what it looks like to you. As Rockdiamond said, this is the purview of Stan Grossbard – and his ultimate test was visual – what can you see and do you like it? If you wish to go with an ”Original Radiant Cut” – do it with your eyes… no numbers will cross those T’s or dot those I’s better… <-- to be honest I was trying to come up with a clever way to tell you to ‘dot your eyes’ and cross your T’s, but it just wouldn’t come to me. I hope you have found an incredible diamond!