crown height %

[z78gml]

I WENT ONLINE AND LOOKED UP ACCREDITED GEM APPRAISERS. I STUMBLED ON THE CUT GRADING FORM FOR THE PRINCESS CUT DIAMONDS. MY FIANCE PURCHASED MY E-RING WITH A GIA CERT AND A IGI APPRAISEL. SO I HAVE NO MEASURMENTS (SARIN). HERE''S MY QUESTION IS THERE ANY FORMULA WHERE I CAN FIGURE OUT MY CROWN HEIGHT% BASED ON MY GIA CERT ALONE.

 

[researcher]

Nope. I asked that question when looking for the stone for my ring. But, I think if you take it to a jeweler they might be able to tell you!

 

[Garry H (Cut Nut)]

You can not work it out from the GIA cert.
It is fairly useless info anyway - it is the angles of the pavilion, crown and table size that you need primarily.

If the stone is set you can learn more with an ideal-scope - links up the top under Tools.

 

[researcher]

Gary's right--at this point an ideal scope would be most useful! If your stone does not have much light leakage, has good scintillation, and lots of deep pinks and reds, you've done well!